Is there anyone more under-rated than Stephen Lang? Don't Breathe was an unexpected smash hit but when he auditioned for Cable in Deadpool II he was ignored.
I watched his one man show Beyond Glory in NYC, it's seared in my mind. He has a new movie called VFW, can't wait to see it.
Of course when you think of tough guys the first name that comes up is Burt Lancaster. I've seen The Train numerous times, he was 50+ when he made it. He used all his skills as a former circus performer to make the film work, perhaps the greatest physical actor ever.
He was 67 when he made Atlantic City. Him hooking up with a young and sexy Susan Sarandon - I had no problem suspending my disbelief.