J-3s are nice, the Citrabira/Champ are too easy imo.
I like the BC-12s, high wingloading only simplifies things. Low wingloading (with a tailwheel and a crosswind) teaches decision making skills.
Ahhh... the T-Craft.
Not many left out there - but you are right.
I think low powered, tailwheels are the way to start.
PS.... I started in a Citabria. I practice what I preach.