Some really interesting thoughts here. Especially SKYLARK and THE LONG AND WINDING ROAD -- I'd have liked to have had those recorded by Frank. Also BEYOND THE SEA -- doesn't that just SOUND like a Sinatra tune to you?
I was listening to an oldies station yesterday, and a Marilyn McCoo (formerly of the 5th Dimension) song -- another pretty ballad -- was playing; changing the singer's viewpoint from female to male, and changing the arrangement to suit Frank, this would have made a nice Sinatra tune. It's called ONE LESS BELL TO ANSWER. For some reason, it sort of makes me think of the song Frank recorded called IT NEVER ENTERED MY MIND.