The Roger I know well is Roger Dale. You don't see Roger used much anymore, that's for sure. I'm not crazy about it, because of the things like "Roger, over and out!" and Roger Rabbit and also the fact roger used to be a slang term for, well, to have sexual relations with. I am not making that up! I have seen it used in that context jokingly even today.
Roger Kenneth
Roger Bruce/Bryce/Brice
Roger Samuel (that's pretty good)
Roger Paul
Roger William
Roger Lloyd?
Roger Isaac