We get good actors, but not a good story for THEM! it boils down to the writing. What works for one actor doesn't always work for another.
Heck, when one thinks about movies......can you picture Bob Hope, Red Skelton playing one of John Wayne's serious western characters, (without turning it into a comedy?) We read of roles some actors turned down, feeling it wasn't right for them.
TV series is a different ball game. Gotta play a lot of episodes as a particular personality. Some actors know their limits, a few don't.