There are Tolkien rip offs, but Tolkien didn’t invent fantasy, and unlike a lot of fantasy authors Sanderson doesn’t include elements like dwarfs, or elves or really anything that Tolkien came up with as far as I can tell. Are you maybe confusing him with someone else?
If you're including Game of Thrones and Wheel of Time, then I guess Sanderson broadly falls into that same category. I'd hardly label any of them "rip-offs", though, especially given that there are books out there blatantly ripping off Tolkien right down to elves, dwarves and halflings.