Henry Jekyll/Edward Hyde (League of Extraordinary Gentlemen)
male
First appeared in League of Extraordinary Gentlemen #1 in 1999. Doctor Henry Jekyll is a physician with a mutated, split personality named Edward Hyde and a member of the Murray Group. He is loosely based on the titular character from Robert Louis Stevenson's Strange Case of Dr. Jekyll and Mr. Hyde.
Add actors/actresses and cast the roles/films/series that they were rumored, considered, offered, negotiated, auditioned, turned down, and/or originally casted before getting recasted. (Please double-check in research.)