My point exactly Siobhan.
(Obscura are good, very good in fact. Have you heard Gorod? They're a French technical death metal band in a similar vein to Obscura... Check out their album Process of a New Decline is you haven't already.)
This is the way a thread like this should work. Otherwise it's just people posting stuff they buzz off, instead of people asking for recommendations.
Anyways, I know you listen to a bit of black metal already (1349, Gorgoroth etc.) so I'm not sure who to suggest but if you haven't already heard any of these they're probably worth a listen. Tsjuder, Diabolical Masquerade, Absu (more 'blackened thrash' but yeah), Dissection, Naglfar, Shining, Drudkh, Gehenna, Peste Noir, Taake...
As for doom, my recommendations would depend on what kind of doom you're after... If you want gothicy doom it's all about My Dying Bride, Paradise Lost, Katatonia, Draconian etc. If you want heavy death/doom check out THE MOST OVERLOOKED BAND EVER, Indesinence. Ahab as well, I rate those guys very highly indeed. As for more traditional doom bands I'd suggest Cathedral, Candlemass, The Gates of Slumber, Reverend Bizarre, Grand Magus, The Obsessed etc.