Very helpful. I hadn’t realized that James Earl Jones is credited as the voice of Darth Vader (at least as of '97) in ANH and ROTJ but NOT in ESB! (referencing my 2011 Blu-Rays). Nobody is credited as the voice of Boba Fett in ESB either. I normally stop paying attention to the credits themselves and just listen to the music, it turns out…
Again, glad to know that the rumor I heard, was absolutely false.