Hopper took some cool photographs in the 1960s — cool not just because he had access to some of the celebrities of that era (Paul Newman, Jane Fonda, Bill Cosby, Brian Jones, Tuesday Weld, Andy Warhol, etc.).
After Art Linkletter and Gary Coleman departed, the Rule of 3 demanded one more celebrity move on to the next world. And though he wasn't born to follow...
Talk about your favorite Dennis Hopper movies. "Easy Rider," "Blue Velvet," "Basquiat," "True Romance," "River's Edge," "Rumble Fish," "Apocalypse Now," "The Trip," "Head"... a huge list. And look at all the old TV shows he had parts in... "Surfside 6," "The Naked City," "The Millionaire," "Petticoat Junction," "Wagon Train," "Swiss Family Robinson"... on and on.
ADDED: This is "The Trip":
AND: Here he is talking about James Dean teaching him how to act:
Here's his screen test for Andy Warhol, from 1965: