OPRAH / RELLET / YEPOD

DRAWKCAB names of silent members of groups in the entertainment field . . .

HARPO was the Marx Brother who didn't have anything to say--or rather, who didn't have to say anything.
TELLER is half of the comedy magic act Penn & Teller, who--despite his name--can't get a word in.
DOPEY is the name of the non-speaking dwarf in the Walt Disney version of Snow White And The Seven Dwarves.