From Easy Rider to Apocalypse Now to Blue Velvet, he was responsible for some of the most iconic roles in some of the greatest movies in history. It is a sad day to see another of the film greats pass on.
Um... I really have nothing to say about Coleman.
He was a child star who, tragically, never really got his life together after being hugely successful in Diff'rent Strokes. Never having seen the show, the only time I heard about him was news stories about his financial difficulties. Still, he did touch many people and during later life developed a cult following.
Not much of a eulogy, but there you go.