Eps:
Warlord - Deliver Us
Mystic Force - Take Command (sliiiiiight preferance over "The Eternal Quest")
Unsilence - Transfiguration
Memory Garden - Forever
These are the first that come to my mind, although there must be some more.
Also for a while my favourite Nevermore release was "In Memory" but i went back to DNB soon.
As for demos, the Heathen's Rage demo (well...it had more songs than the ep...so it wins by default) and the Sarissa demo that Orfanos mentioned are some of the best examples. Also i sometimes prefer the "A Vertigo Edda Arised" demo by Airged Lamh, from the "The Silver Arm", mainly because of the unbelievable singer of the demo, plus the album didn't have a "The Wedding".