I have seen hard sided (non-hybrid) trailers where the bunks have a decent amount of head room. Every brand makes some sort of "bunk house" floorplan or two.
Were on our 2nd hybrid
and maybe 600 nights between them camping since 2005. The two Aerolites we have had now, my wife will read in bed by propping up 3 pillows against the bunk wall just before the soft canvas section starts. I always get the outer end of the bunk as I do my reading on the couch, and then go to bed. Usually she falls asleep reading....
You have to understand, if you want bunks and a couch, your looking at a 32' long trailer or more. The hybrids we have owned have been the most cost effective RV for the size. Ours is 26' and opened up it's like having a 32' rig.
In 26' we have two queen beds, 62" couch, huge pit dinette. Good counter space and a huge deep storage cabinets.