Warrax
Good at Melee and Magic attack .
The first game I ever won back when it came out with floppy discs.
He was able to wipe out every town with a mediocre weapon and magic immune breastplate.
I had lost every game so far and accidentally put him on auto and he shot them all with his lightning attacks.

Interesting. I've never really used Warrax because he's more of a late-game hero. I'll have to give him a tryout.

I almost never use spells with heroes/champions.

I just give them powerful artifacts, go to battle, and click click click click click, I win.

Same here. I get Malleus, Shuri, and another (maybe Morgana or Yramrag). I give them Guardian Wind and Magic Immunity, another item with Flight and Endurance, and a staff with a lot of pluses to Attack and To Hit. I fly them around destroying everything with magic attacks. Flame Strike is good when there are invisible enemies. So is Summon Phantom Beast. However I try and avoid invisible enemies unless they did in behind city walls.