Okay, this is my playstyle (Nord):

Whenever I approach an enemy, I always scout out the area first, then maybe pick off a few stragglers with poisoned arrows, then go charging in with 2 handed battleaxes or warhammers, I also wear only heavy Armor and I am very adept at lockpicking

I thought warrior described this well, but warriors are mostly sword and board, and I don't use swords nor boards, so I don't know

Sounds like a scout class to me. NVM, you said two handed, not two weapons.

Tank, Warrior, it's pretty much a heavy hitter build.

You're a warrior.

I thought about scout, but then I thought, scouts don't use 2 handed weapons, so I went with barbarian scouts, then I thought, neither scouts nor barbarians wear heavy armor, at that point I gave up

In Morrowind, they call those "Adventurer"

Oh, two handed. I thought you meant two weapons. My bad. With that, I'd say a warrior build. Warriors can use bows and poisons too. Not sure if I can get more specific for the name, though.

Is adventurer like, a miscellaneous class that pretty much engulfed anything that didn't fit an easy description

That's the default name for custom classes, yes.

Ranger? I think it's Adventurer