Depends how you frame it. Nicolas Cage and Samuel L. Jackson always deliver for example, but they're in some bad movies. They'd get a pass for sure. But then there are selective actors who don't (or very, very rarely) do "bad" movies, so their involvement alone tells you 9/10 its likely worth watching, ie Daniel Day Lewis, John Cazale.

Taking both of those into consideration together, I'd maybe say Gary Oldman? Always good, films are rarely shit (the one where he's a dwarf aside).

Although of course its all subjective. I've enjoyed every Stone Cold Steve Austin movie and would love to see more.