I never watched an X-men, nor the old Dune, so for me Patrick Stewart is Jean-Luc Picard.
Agree! When I see him in other things I’m like “oh hai Picard”
Jason Alexander is cemented in my memory as George Costanza.
Art Vandelay.
Carthwright.
Pennypacker.
Duckman
For me, it’s David Tennant as The Doctor. It was very strange seeing him in Good Omens.
Jaleel White is forever Steve Urklel.
Alfonso Ribeiro is Carlton.
William Shatner and Leonard Nimoy as Kirk and Spock in the early Startrek films and series.
Same for Brent Spiner as Data.
Lucy Lawless will forever be Xena the Warrior Princess.
Sarah Michelle Gellar will always be Buffy Summers to me.
I somehow missed Buffy growing up, so my first exposure was of her as Daphne in the Scooby Doo movie.
I think now that I’ve watched a lot of Buffy, those two balance out for me.
Daniel Radcliffe.
After seeing Swiss Army Man, I can never not see him as a useful corpse. He nailed that role.
Hal.
Tim Whatley
Kenneth Parcel’s mom’s new friend Ron
Now, Kenneth, I’m just tryin’ to replace your dad.
Peter Lustig. But he also played himself and had full power over his show.
Martin Freeman as Bilbo
Til Schweiger as his arrogant asshole self
Ryan Reynolds Van Wilder
Norman Reedus with forever have “and the funky fetus” after his name because of Death Stranding.
For me he’s always gonna be a Boondock Saint.
Surely you meant Darryl Dixon?
Danny Trejo is of course Machete (or Uncle Machete to the Spy Kids) - even if he does occasionally rangle Rancors or other roles.
(But only when I can see him. I had no idea he had that many voice roles until looking him up just now)
Sarah Jessica Parker is Carrie Bradshaw.
Roger Moore as Bond - he wasn’t the best Bond, just that he played that character for like 30 years, starting with The Saint in the 60’s.
Once you see him there, it’s hard to see him as anything else.