Not to dis Manzarek, but I never liked his sound. I was raised on Booker T. Jones (Booker T and the MG's), Jon Lord (Deep Purple), and Keith Emerson (Emerson, Lake, And Palmer) - all masters of the Hammond organ. By contrast, Manzarek only had one tone and it leaned toward screechy. He did have great riffs though and he did his best to keep Morrison from floating out into outer space.
Rest in peace Ray