Phazonfish
B-Rank Agent
I've made them d12 cantrips in my games. After all, if you're going to be casting the best melee cantrip, it should do more damage than the best ranged cantrip.
Do keep in mind that the melee cantrips already have a few advantages over ranged ones: they don't suffer disadvantage when in melee, they can be augmented by abilities that effect your weapon attacks (for example, sneak attack or divine smite), they can be augmented by the properties of your weapon if your weapon is magical or poisoned, they run off of your weapon attack mod instead of spell attack mod, and they come with a rider (which ranged cantrips often do, but not the hard hitting ones).