Instead of Multiverse, call it Alternate Realities, that will cover things like Riverworld by Farmer, the Amber Series, the Immortals series by Piers Anthony, etc.
Under Alien Contact, add the Heechee saga ( Gateway, Beyond the Blue Event Horizon, Heechee Rendezvous, and Annals of the Heechee ) by Frederick Pohl.
Under Nature of Reality, add Wave Without a Shore by C J Cherryh
Under Teleportation, add Jumper by Steven Gould, and the Rowan series by Anne Maccaffery
Under Space Opera add Honorverse by David Weber
Under Human Evolution add Four Lords of the Diamond series by Jack Chalker, add the Soul Rider series by Jack Chalker, and the Well of Souls series by Chalker as well. He's big on human transformations.