I've heard Stephen Baldwin talk about The Usual Suspects fellowships who meet and try to pin the Keyser Söze identity on characters other than Verbal. I know that Verbal is the true Keyser Söze, but does anyone know any of these alleged proofs and particulars for other characters being Keyser Söze?
There aren't any.
In fact the film goes out of its way to make it clear that Verbal is Soze by including:
A careful review of the film will demonstrate that Verbal is Soze from the beginning and the film throws various MacGuffins in the way to prevent a less discerning viewer from realizing that early on.