It's definitely a massive amount of oil dripping, from above the oil pan (already changed the gasket). I can't see any oil from looking inside the engine from above. So I'm fairly sure it's the crankshaft seal, although I can't know for sure until I take the radiator/fan/belts off.

Is there anything else it can possible come from? I'm 99.9% sure it's coming from around the inside of the lower (crankshaft) pulley.

Even if it's not for some weird reason, I'll at least get a better look as to where it's coming from and then be preventative with the front seal anyway. Car was neglected enough anyway.