Just finished my Dragon Greatsword run. Ended up sticking with it throughout. A good R2 hit from that thing does over 900 damage to most enemies, including bosses. I'm normally a light roll kinda guy but that's hard to do with a weapon that weighs 24 units, so I went with the Golem armor (which looks cool as heck), stuck a grass crest shield on my back (obvs), and the usual rings (Havel & FAP). Beasted all over everything despite this playstyle being somewhat different from my norm, had no trouble midrolling when I needed to, like for Artorias, and taking a hit was no problem either. Of course I did finish around SL 90 so yeah, pretty OP for NG. 40 vit, 40 end, 36 str and a few points in dex because of reasons (idk).
Much as I like to light roll and use actual skill, I have to admit the game is just a lot easier in heavy armor with a weapon that deals high poise damage. You can trade hits no problem and come out on top, even against many bosses. Not that much real skill required if you min-max right and know the mechanics. More metagame than gameplay skill. It is satisfying though. But I know it's not nearly as viable on NG+ later on in the game, so maybe I'll have to revise that if I continue.