It's just that after his brush with fame in the 1970's, he seems to have ended up headlining movies that no one has ever heard of. This seems to happen to a lot of actors and I suppose that most of us will never know why so many rising stars seem to fade for no reason at all.
Certainly I'm not the only one who admired Timothy Bottoms work in The Last Picture Show and The Paper Chase, and with such superb past performances it's hard not to wonder, what happened? Especially when you see him in more recent projects and he's just as good, even if the material isn't.
Check out the movies already listed along with 1975's Operation Daybreak, the television mini-series East of Eden and the short lived Comedy Central sitcom, That's My Bush, where he played President George W. Bush, and you will understand why Timothy Bottoms is my pick of the day for Not Very Famous...but should be.