Green Lantern. Pact with little blue guys to shoot green blasts (and shape them to do cool stuff).

Tim the Enchanter from Monty Python and the Holy Grail. Blast, blast, blast!

Many “blaster” heroes and villains. Iron Man was mentioned in another Warlock thread. Lightning Lad works too. More blaster than pact-maker, mind you.

Daleks work if you squint a bit. Exterminate!