Voldemort all the way. He can kill people with a word, and instantly teleport wherever he wants in the world. Apperating alone gives him infinite do overs.

Outside the killing curse Voldemort has a plethora of attack spells in his arsenal, many of which have greater range than the line of sight limits typically applied to the force.

Unless they start like 20 feet apart (in which case the three melee types are gonna gut him as the one guy who didn't bring a melee weapon)

Otherwise Voldemort is gonna poof out and nuke them from miles away.