Good to hear from you again, Robb. I liked John Lee Hookers' reply when once asked why he recorded under so many aliases in his early years- " Well, moneys pretty exciting,you know.."
Although they are best known here for their 60's Northern classic 'Love Game (From A-Z)' on Wingate (their last record) The Royal Jokers,as you say, went way back to the post-war beginnings of R&B group harmony;their mid-50's adopted name was deceptive as they were'nt Coasters clones and only did comedy routines on stage-on record their material was pretty much straight Doo Wop, i.e. ballads and jumps;their Atco sides are good examples of the latter and 'Sweet Little Angel' on Fortune is a wonderful ballad,a great favourite of mine.
Re.Graham who posted above about Richard Berry;although he sang uncredited with a number of groups in the bewildering,wonderful discographical tangle that was the 50's/early 60's LA Doo-Wop scene,I don't think he recorded under many aliases; his group The Pharaohs recorded as The Cyclones for Flip in 57' and he cut a 45' under the name Jasper Woods ('I'm Coming Home' on VPM in 1961) I don't know of any others.