Here you go...
Zero Mostel (The Producers) Gene Wilder (Willy Wonka and the Chocolate Factory) Marcus Powell --> Rycar Ryjerd in ANH
Also:
... (Willy Wonka) Rusty Goffe --> Kabe, Jawa, GONK Droid in ANH
or
... (Willy Wonka) Malcolm Dixon --> Ewok Warrior in ROTJ
Don't ask me who the hell Rycar Ryjerd was in ANH, but he's listed in IMDb as being in the film. So I won't complain especially now that I have three direct links from Gene Wilder to SW. That covers quite a few films and anything Mel Brooks has ever done.
I think we've done Mostel before, but I know it wasn't this short. Once I saw Wilder in the Producers, I figured one of the Oompa Loompas had to be in a SW flick somewhere down the line. Dwarf and midget actors tend to be used quite repeatedly in Hollywood.
How about Jean Harlow? Have we gotten around to her yet?