It would probably be easier and quicker to list the people who don't sound dodgy. Almost all the people who get more than a cursory mention in the bible have some really weird stuff going on!
Who needs 1000 wives?!?! Who could kill 700 (7000?) warriors using a donkey's jawbone? I don't think so! And all the other various and sundry folk who have either some supernatural ability, some "who cares?" ability and on and on. It's like any other story ever written since writing was invented: Who wants to read boring, banal crap? You've gotta "punch it up" a bit to keep people's interest.
If Solomon had even 5 wives, who would care? Some Mormons do better than that ... today! And killing a guy using a sharp or hard piece of bone (but why the jawbone? Hmmm...) isn't a big deal. You can kill somone pushing them down a stairway. But killing hundreds of people, that's a kick-ass deed! Even Bruce Willis and Arnold Schwartzenegger have yet to top it.
So, I think it is all poetic license of a sort. Marketing the book to the masses is a whole lot easier with sex and violence on a huge scale.
Robert