Mina Harker Appearances
The story of Dracula was originally adapted as a stage play, and then went on to be told through moving pictures hundreds of times over. Mina is a character in this story, absolutely an archetypal horror heroine, but she is also relegated to plot device in a lot of ways, so seeing how she's treated in the story is a fascinating way to watch film's relationship with female characters evolve. I tried to keep this list more or less in chronological order.
One of the very earliest takes on the story of Dracula was 1922's Nosferatu, the classic silent film by F. W. Murnau. They didn't have the rights to the original story, so all the characters names were changed, and Mina became Ellen Hutter. She was played by German actress Greta Schröder.
It is functionally impossible to talk about a character from Dracula and not talk about the 1931 Universal Pictures film classic Dracula starring Bela Lugosi. It's based heavily on the 1924 stage play by Hamilton Deane, the first adaptation of the original novel to ever be authorized by Stoker's widow. This take of the story is the one most commonly adapted by all further versions. Here, Mina is the daughter of Dr. John Seward, so it's implied that her maiden name is Seward rather than Murray. She's played by Helen Chandler.
While The Hammer Horror 1958 classic Dracula (Horror of Dracula to American audiences) starring Christopher Lee and Peter Cushing was a retelling of the original story and featured Mina (Mina Holmwood, this time), the character was absent from the subsequent sequels that extended all the way into the mid seventies. She was played by Melissa Stribling.
It's specifically because of the existence of the ongoing Hammer Horror series of Dracula films that the BBC's 1977 adaptation of the original novel was so relevant; because the average viewer only knew Dracula from that film series. It was a much more accurate adaptation, although in this version Mina and Lucy are sisters. Mina is played by Judi Bowker.
The 1979 movie Dracula starring Frank Langella was deliberately rewritten to be more romantic.... the movie was actually captioned "Dracula: A Love Story" on the posters. Mina is in it, played by Jan Francis, but her role is reversed with Lucy, who becomes Dracula's primary target/love interest. Instead, Mina is the daughter of Van Helsing.
Francis Ford Coppola's 1992 film Bram Stoker's Dracula was a fun take on the original novel. Coppola was deliberately trying to make large parts of the movie seem like an erotic dream, which makes the movie decidedly weird. It featured Mina much more prominently than she'd been depicted previously. Pika specifically pointed out that her version of Mina actually takes after this version. She was played by a height-of-her-coolness Wynnona Ryder (who also played a character sitting right across from Mina in GND 125.... interesting...)
Audiences had been reintroduced to Dracula thanks to the Coppola film, so in 1995 Mel Brooks made his own vampire movie Dracula: Dead and Loving It, this time heavily spoofing the original Bella Lugosi Universal film. Mina is played by regular Mel Brooks actress Amy Yasbeck.
By far the best interpretation of Mina, to say nothing of her status as one of the best characters in comics in GENERAL, is Mina Murray as depicted in Alan Moore's 1999 work of absolute literary genius The League of Extraordinary Gentleman. Mina is a bisexual suffragist and leader of the team, and is just generally awesome at everything all the time. Alan Moore has this tendacy to aggresively deconstruct his own work if he ever comes back to it, and the subsequent tales of the League after it's initial arc diminish her character, so I prefer to think of it as a single contained story. Pika deliberately mentions that her Mina takes some of this characterization.... specifically describing her modern incarnation as "a very modern-thinking and elegant young lady... who is probably doing Women's Studies or Journalism, and writing a thesis on "Reactionary Gender Roles & Implicit Misogyny in the works of Stephanie Meyer""
This one is weird. the 2000 movie Shadow of a Vampire posits that back in 1922 when they made Nosferatu they used an ACTUAL vampire. So... it's a movie about the fictional filming of an actual movie. Catherine Mccormack plays Greta Schröder, the actress playing Ellen Hutter, the original Nosferatu's version of Mina.
the 2003's movie adaptation of League of Extraordinary Gentlemen was so bad it is routinely acknowledged as the experience that led to the retirement of Sean "Zardoz" Connery. This is, weirdly, the first reference i can find of Mina becoming a vampire herself. She's played by Peta Wilson, the star of the underrated Canadian series La Femme Nikita
The 2006 BBC telefilm Dracula was a slight variation on the story, but the most notable thing happening here is that Mina is being played by Stephanie Leonidas, who was both Helena in Mirrormask and Irisa in the Scifi series Defiance.
The six part BBC series Demons aired in 2009, and gave us a much more interesting take on the contemporary vampirized version of Mina. In this case she's a half-vampire (which they don't specifically refer to as a dhampir, but that's a dhampir), who uses dialysis to control her vampirism. Also, she's a blind clairvoyant. She's played with plenty of badass-ery by Zoe Trapper
The 20013 series Dracula starring John Rhys Meyers was set in England, with Dracula posing as an American entrepreneur... a 1890's secretly-vampiric Tony Stark. Mina, in this case, is supposedly a reincarnation of Ilona Szilagyi, who in actual history was the second wife of Vlad the Impaler and the cousin of King Matthias Corvinus of Hungary. Jessica De Gouw played Mina... she's probably most famous as the Huntress on the CW series Arrow.
The Mina-as-a-vampire story idea returned in the 2014 Showtime series Penny Dreadful, a series that might as well be a 19th-century version of GND. Mina's father Sir Malcolm Murray is one of the series main characters and is played by Timothy Dalton. She appears throughout the first season, played by Olivia Llewellyn.
The 2014 movie Dracula Untold re-purposes the tale of Vlad the Impaler as a superhero origin story, and the results are pretty enjoyable thanks to Luke Evans being incredibly fun to watch. Sarah Gadon plays Vlad's wife, a character named Mirena... and then appears in the end of the movie as Mina. This is a return to the idea of Mina as a reincarnation of Vlad the Impaler's wife... and their take on Mina actually doesn't look that far removed from the GND Mina.
Comic Appearances
GND 125 - Sarah & Christine introduce Shilo to some of the Wibsy Club: Chihiro, Lydia Deetz, Susan Pevensie, Mina Harker & Liz. (Fangbangers like Sookie Stackhouse, Anita Blake, Elena Gilbert & Bella Swan sit at their own table... while Buffy sits with the Scoobies) Also, Graverobber is in jail, and Jareth sort-of proposed.