We have a Gulfstream Conquest Model 6237. It has a bed in the back corner and a full bath next to it. No slideout. Very large storage area accessed from outside below the bed. Ours also has a queen-size bed above the cab that we use for extra storage area for clothes and blankets, etc.
Forest River Sunseeker or Forester (different names for same models) have similar model to ours but rear bed is a queen size and roof material is fiberglass instead of rubber covering. Thor and Winnebage have equivalents. These no-slide Class C are what I call starter models, generally discounted to the $50-55,ooo range.
There is a slight advantage to Class B+ since they are a bit narrower than the Class C. B+ usually less than 8 feet wide while C is typically 8 feet. Look at Phoenix RV models for some good B+ choices.
Again, all major manufacturers have B+ model lines, although finding a short model with a bed in the rear is sometimes difficult. The B+ seem to cost about 10,000 more than Cs for some reason.