Robert Redford's appeal as a leading man was more my mother's generation than mine.
That said, there was a woman at my job in my early 20s who was also of that generation and she gave me a recipe for a dessert called "The Next Best Thing to Robert Redford Cake."
That cake got rapturous reviews anytime I took it to a potluck so I'm guessing he was pretty popular.
I do know him from his bit of time in the MCU but I can't think of anything else I've seen him in. I tried to watch Three Days of the Condor a couple of months ago but it didn't grab me.
Adding on after Googling: I now remember he was in a movie I try to forget called Indecent Proposal.
He was also in a movie I loved but haven't seen in a long time called An Unfinished Life. There's a theme in that movie as he tries to kill the bear that maimed his friend but his friend, played by Morgan J. Freeman, isn't angry at the bear for simply being a bear and doing things bears do. I try to remember that sometimes when kids act like kids or hurt people act like hurt people or teenagers are simply acting like teenagers.