For intermediate to warm temps, there are a few ways to go. Many of the hybrids do really well. Things like Red Wing, Macchu Picchu, Copper Angel, Angel Frost, and Marguerite are all great. There are any number of more complex second and third-generation hybrids as well. Most have been bred for warmth tolerance.
For species, there are a bunch.
Most of the Alaticaulias are good bets: infracta, klabochiorum, draconis, pinocchio, bicolor, etc. These are nice choices because they are a little more drought tolerant than others, and they will forgive some unevenness of care.
triangularis, floribunda, and mendozae will do well.
Regalia princeps and ayabacana are all right - slower growing, but extremely showy when they start to bloom.
I did well with Reichantha rolfeana in intermediate conditions.
Byrsella civilis and peristeria both performed well for me in intermediate conditions.

If I had to choose one plant, it would be a division of an awarded Masd. Copper Angel. They're relatively inexpensive, they grow well, and they bloom all the time. They're quite showy, as well.
If I was only interested in species and had to choose one plant, it would be Masd. infracta. Very tough, very warmth-tolerant, and blooms a lot.