Michael Keaton is a solid, fun actor who has produced a great body of work. His version of Batman was extremely well done and a real departure for a guy who had been primarily a comic actor.
His comic movies have some classics and cult hits. Beetle Juice was fantastically dark and ridiculous. Mr. Mom was a surprise hit and Johnny Dangerously was a surprisingly good, low-brow farce. Night Shift was also a big hit in the 80s.
A huge star in the 80s who has shown staying power as a character actor and mid-level star in the 90s and 2000s. An impressive career.