Ye be fairly warned, this is a very fanboyish post.
{The Goa'uld}
Major System Lords
Ra - dead, SGC probe
Apophis - dead, SG-1/the Replicators
Heru'ur - dead, Apophis
Cronus - dead, SG-1/SG-1 androids
Yu the Great
Nirrti - dead, SG-1
Ba'al
Out of Sight System Lords
Olokun - dead, Anubis
Kali
Bastet
Morrigan
Imhotep - dead, SG-1
Serve the System Lords
Klorel - dead, SG-1/the Tollan
Zipacna
Terok - dead, Raknor
Tanith - dead, SG-1
Left Behind
Hathor - dead, SG-1
Set - dead, SG-1
Osiris - dead, SG-1
Isis - dead, died in exile
Marduk - dead, SG-1
Egeria (mother of the Tok'ra) - dead, the Pangar
Returned Exiles
Sokar - dead, Apophis
Anubis

{The Jaffa}
Horus Guards - Ra, Heru'ur, Hathor
Serpent Guards - Apophis, Hathor
Setesh Guards - Set
Devil Guards - Sokar, Apophis
"Ninjaffa" - Anubis (get it? ninja + jaffa = ninjaffa)
Drones/"Super Jaffa" - Anubis (it's really too bad we haven't seen a Jackal Guard since the movie, they would look way sweet)