Was excellent
in Midnight Express but I can't remember seeing him in anything else. It looks like he slipped in to mostly TV Movies and didn't get the roles his talent might have earned him. Maybe it was at least partly his choice - maybe he was very much his own man which closed a lot of doors but perhaps also allowed him to pick the interesting roles - at least I assume they were interesting because you don't seem to see them anymore so how can we judge.
I remember reading his career was damaged because he was gay and he died young from Aids and that was pretty much the whole story - of course it wasn't but that's how it was told at the time.