Went looking through their wikis to see who else they played and…
Amir Talai (Alastor): Tom Trench
Blake Roman (Angel): Egg Bois (and one of the mariachi imps in Striker’s Ballad)
Joel Perez (Valentino): Mariachi imps in Strikers Ballad (so… anyone wanting an Angel and Valentino song should just listen to that song 😂) and Dr Somna (Loona’s doctor) (thanks @xxqueenofdragonsxx for reminding me of these ones)
Alex Brightman: Fizz, Robo Fizz, Adam, Sir Pentious
Brandon Rogers (Blitz): Katie Killjoy, Loopty Goopty (the rich old man who hired IMP to kill his business partner), doctor in HB pilot, Crimson’s maid ( @warmrainplease )