......Or rather, what are the variety of horned helmets in Skyrim, and where/how can I acquire them in skyrim?

My ideal would be a golden helmet with the horns of a bull lol

Ancient Nord helmet (my fav one, tho only the male version),
Yngol's Helm (from Yngol's Barrow east/north-east of Windhelm),
Iron Helm,
Horned Steel Helm,
Stalhrim Helms (light and heavy variants, in Dragonborn DLC).

Heavy Stalhrim Helmet.

where can I find the ancient nord helmets?

Ancient Nord Helmet is utterly fantastic, though I prefer the design of the Yngol helm. Those tall spiky horns look so at home in skyrim. I ended up having to give the helmet up for enchanting purposes.

It's a shame that draughr armour wasn't really an option in the game. The ancient nord armour just doesn't add up. Awkward mini skirt thing. Fur.. no chainmail underneath. There is also a helmet that has something like metal sunglasses frames attached to it that many of the draugr wear which I find to be very cool, but alas there appears to be no wearable version of this in the game. Big missed opportunity me thinks.

In various ancient nord tombs, also, you can smith your own once you complete the companions main quest, but you can only make these at the skyforge in whiterun.

oh yeah, the ancient nord armor... it works for female characters, but it doesn't even fit a male body. the textures of the mini skirt go through the legs... worst overall armor imo

I think you can craft Ancient Nord Armor at the Skyforge in Whiterun.

The Ancient Nord helm is my favorite, followed by the Helm of Yngol and Jagged Crown (which is a quest item, but there's a glitch where you can keep it - or one can be crafted through mods).

Ancient Nord, Yngols helm and Stalhrim are straight boss.

In Forsaken Cave. If you don't know where it is then just go to Windhelm and follow the road alongside the river to the West until you'll see it.
Another place is Forelhost which is located South-East from Riften.