did he live up to his potential

Interesting quesiton...

He has had a long, very successful career (40+ years), so yeah he did great. However, he never made it as an A-list, though he definitely tried. More a B-level who can co-star in a big movie but is never the main reason someone goes to see a film.

Back in the mid-80s was his best shot, with DOA/Innerspace/Big Easty/Suspect, but it didn't work out nor last long. He never made it to Harrison Ford, Tom Cruise, and Kevin Costner status.