We have some of the best shit ever released, but for the "not so know bands", here's one of my lists (probably you listed much of this, but anyway, here it is)

Centurias
Salario Minimo
Titaniot
Azul Ciano
Dominus Praelii
Metal Morfose
Platina
Mammoth
MADE IN BRAZIL (actually, this is the band's name)
Shock
A Chave Do Sol
Expose Your Hate
Animal Fest
Comando Etilico
Sodomizer
Alta Tensão
Metralion
Deathraiser http://www.metal-archives.com/bands/Deat...3540325177
Stress (Flor Atomica)
Primordium (kind of a BR Nile)
Viper (this is a very well known band for us brazillian metalheads, check the album "Soldiers of Sunrise")
Taurus
Verres Militares
Inox
Muro
Harppia
Holocausto
Carro Bomba
Possuído Pelo Cão
Albor
Vocífera
Torment The Skies
Selvageria
Anthares
Alcoholocausto
Cavalry Death
Cangaço
Oitão
Carro Bomba
Blasfemador
Volcano
Farscape
Atomica
Sextrash
MX
Firestrike
Overdose
Primordium
Viper
Morte Incandescente
Messocranio (check the album "A Saga Pagã")
Hazy Hamlet
Vinculum
FARSCAPE
Em Ruinas
Scream of Death (check the album  "Madness of Mankind")
Hecate
Lúxuria de Lilith
Malefactor
Comando Nuclear
Nervochaos
Panzer
D.F.C.
Gangrena Gasosa
Avalon (check the split with Megahertz called "Stop The Fire/Technodeath")
Cruel Force

And of course, for those that need to be introducted to Brazillian metal, I strongly recommend the very well knowed acts: Sarcofago, Sepultura, Korzus, Torture Squad and of course, the pride of south brazillian death metal, KRISIUN!

Cheers!