Lead singer. You can find examples of the guitarist being more prominent - Townsend, Page, etc. But those are exceptions. Otherwise, guitar geeks geek over the obscure guitarist or rare bassist, but 99% of people don’t notice them.
I’d rather not be Roth or Van Halen. Have you seen those guys lately? Here’s a little Tale from the Crypt!
ETA: Little Nemo’s point is valid, although 2/3 of the “better” people he names are dead, so not sure I’d want to be them!