Cary Grant
Arsenic and Old Lace! A classic!
Jack Lemmon
I’m a big Grant fan. (Arsenic and Old Lace!)
But Martin would get my vote. Got to see him on stage when I was in college. He was a hoot. And he shows up occasionally at festivals in the area where my mom lives (Ashville) to entertain and play his banjo. They love him.
I’ve heard Cary Grant was an acrobat and possibly a juggler, but have never seen him do it.