Freddie and Bel (of The Hour) definitely are wizards (she's rated a lot higher than him, though), and have been partnered up for long enough that they're starting to get itchy about it. So are Sissy and Kiki; the latter is plausibly young enough (18? 19?) for S2 to have been her Ordeal, and Mr. Cilenti makes a very good Lone Power.

I am not sure whether it's Lix, Hector, or Randall who's Power-ridden, now I come to think of it.

ETA: AND MARNIE. Marnie is absolutely a wizard. There is no other explanation for how she gets her eyeliner to do that. Hector just hasn't noticed.