Many uses for that list. Fender 5E3 is first one to mind.
Have a look at some circuits to see what you would like to try:
The Blue Guitar
The 12BH7 are useful little valves, The Blackstar HT5 uses one.
They are good reverb drivers.
I have built a firefly type amp to get 3 watts PP from one 12BH7.
This small stereo amp uses them also:
Shishido 12BH7 Push-Pull Amplifier