Oh, Gaban appeared next to Rayleigh in a trash One Piece game... I'm pretty sure that said picture is enough to make Rayleigh≈Gaban despite not being any feat/portrayal in favour of Gaban in the canon material. Matter of fact, we should actually push the Gaban>Rayleigh agenda cuz why not.
Like, now seriously guys, Oda literally made him appear once and ditched him in the trash. How can y'all be that delusional LOL