Trying to figure out best 5th wheel? Advice appreciated

As far as I know any hitch mounted on center of axle or slightly toward on a short bed , cannot back 90 degrees that I’m aware of . Ford has the best chance at it being the longest . But with that said , how far the pin box sticks out , and the profile of the front cap may permit some . No concern to me , I’ve cranked my fifth wheel into some pretty tight spots without a problem , but no not 90 . But there is that BIG compromise, a sliding hitch :B