I found an article on this website called coolmaterial.com that broke down 9 beloved movie characters that were most likely stoners. It also explains why they feel this way. Making the list was:

Yoda
Fat Bastard
Dr. Emmett Brown (Back to the Future)
Shaggy (duh!)
Rex (Toy Story)
Neo (Matrix)
Crush (Finding Nemo)
Bella (Twilight)
and Willy Wonka.

Click the link to read the breakdown!
Probably Stoners