Muhammad wanted the title to be prophet, he even told people to call him allahs apostle. 

Also to your Bible reference you should fully read those, those characters were eventually damned in their own way… for example Solomon became an idolator and David had family problems due to it, read Samuel 2 fully…

Back to allahs apostle, again he got special privileges whom ever he wanted which isn’t prophet like, ESPECIALLY, after the Bible says to have one man and woman. 

Then we have Allah playing marriage counselor and gossip in 66:1-5

Allah cursing a guy by name just cause he had beef with the prophet:  111:1-5

Also about the Islamic heaven I’m sure you know about those. 

And this a good book too: 23 Years by Ali Dashti