No way I could remember them all. I tend to do the same as the OP when I read sombody new. After reading for more than forty years, the full list would be reeeally long.
Off the top of my head (mostly) and to the best of my knowledge:
Spider Robinson, Tom Robbins, Harlan Coben, Terry Pratchett, Christopher Moore, George P. Pelecanos, Walter Mosley (except the sci-fi after Blue Light. what the hell was that?), Steven Brust, John Irving, Kilgore Trout , Larry Niven, Roger Zelazny, Al Franken (except the Stuart Smalley stuff), Robert Ferrigno, Richard Russo, Neil Gaiman (novels only, not even close to all the comics), Tim Dorsey, George Hayduke, Kurt Vonnegut, Neal Barrett Jr (all I can find, anyway), Walter Jon Williams, Bill Fitzhugh, GM Ford (think that’s a pseudonym?), Sherri Tepper (but not Ruth Rendell), Don Winslow, Tim Powers, Joe Haldeman, there are certainly more.
Honorable mention to Tom Reamy, who wrote (according to the introduction) only one book called Blind Voices.
I get even more obsessive with music. (I really wish I had more disposable income.) At least with CDs I can enjoy the same one repeatedly (and often).