Both GUE and UTD have a full recreational curriculum, up to and including light trimix and a little bit of deco. The Rec 1 through Rec 3 sequence from either agency will build a solid recreational diver with good buoyancy and trim, a full toolbox of kicks, the ability to hold a stop and shoot a bag and to solve problems and communicate effectively underwater.
The holes are navigation and rescue skills (a little bit of which are included in both sequences), and specific classes for those two things would round out a really good recreational diving education. A wreck workshop with some introduction to line work would enhance things, too.
Cavern and Intro to Tech lie in that "techreational" grey zone. I personally do not believe that there is a bright line between recreational and technical diving. I think the desirability of solving problems underwater increases as you go deeper or begin to explore overheads, and classes should be (and for the most part, are) focused on building those skills in divers, as the dives become more challenging.