I know the expression “character actor” is silly but please play along. Secondary actor is probably more accurate.
For me there are too many, both dead and alive.
One was Victor Argo, who was in “King Of New York” and “The Last Temptation of Christ”.
Paul Calderon, the bartender in “Pulp Fiction”
Giancarlo Esposito, who’s in the hospital dealing with the burned Hungarian mobster in “The Usual Suspects”
Victor Garber, who played Tish in “Light Sleeper”
David Patrick Kelly of “The Warriors” fame (“Come out to PLAYEEEEEE”)