Well, taking the challenge more generally, a heavily twinked clvl 1 character in Diablo 2 classic with pre-1.08 items (that still have no level requirements) would do the trick =) Probably a spellcaster, since any melee would have trouble hitting because of the AR/DR curve.
More specifically, a sorceress could easily get level 6 charged bolt with ample mana supply, 30% run from unique boots, and using some skill points and stat points acquired from completing quests, could get the stats and skills needed.
Outside of that, I really don't thing anyone could take at clvl 1 on cows in 1.10, mainly because of improved speed and damage. A lvl 1 character simply cannot outrun a cow to make any tactical manuevers, and have enough life not to go into hit recovery (or block) after a hit, which together pretty much make any such attempt futile.
More specifically, a sorceress could easily get level 6 charged bolt with ample mana supply, 30% run from unique boots, and using some skill points and stat points acquired from completing quests, could get the stats and skills needed.
Outside of that, I really don't thing anyone could take at clvl 1 on cows in 1.10, mainly because of improved speed and damage. A lvl 1 character simply cannot outrun a cow to make any tactical manuevers, and have enough life not to go into hit recovery (or block) after a hit, which together pretty much make any such attempt futile.