The supercab F150 has serviceable back seats. There is no need to gimp the bed with an oversized crew cab.
The backseat is passable with my dog and kids, but barely. If they were able to take some room from the front where there is no engine and give me both a reasonable bed and a crew cab I would be happy.
A lockable frunk is pretty attractive though so that you don't have to worry about leaving tools in the bed.