Don't feel bad if you've never heard of Rondo Hatton. He never heard of you, either. And in truth, he was never a big star. Universal tried to capitalize on his weird looks in a series in which he played a hulking menace they called "The Creeper" (but never titled any of the movies that).
Rondo suffered from acromegaly, a condition in which the bones of the head and the extremities continue to grow well after the time they'd have been expected to stop. Legend has it he was a handsome young athlete in high school who went off to World War I and got hit with mustard gas, and that's what caused his state, but it's really a disorder of the pituitary gland.
The reason he got my last Drawloween spot of the year (well, other than that face) is that he's become somewhat more famous since his (sadly, but predictably) premature death. Rondo is the face (so to speak) of the Rondo Hatton Classic Horror Awards, a fan-voted award to the best in spooky every year, including films, film preservation, podcasts, research, and other categories. You should know about that, even if you don't know about Rondo himself. Also, they have an awesome statuette that they give out.