Not a white Thing Part 2

If that's not enough here's a list:

Argentina
Hermética

V8 (band)
Almafuerte (band)
Rata Blanca
Tren Loco
Alakrán
Horcas
Kamikaze
Riff
El Reloj
Nepal (band)
A.N.I.M.A.L.
Arraigo
Tersivel
Bolivia
Anomalía
Dominique
Dead Memories
Ztate Of Mind
Dragón de Comodo
Delanz
Hate
L.A. Nekra

Brazil
Angra - a Power Metal band that takes occasional influence from traditional Brazilian music, especially on their Holy Land and Temple of Shadows albums, particularly the song 'The Shadow Hunter' off the latter album.
Tierramystica - a folk/power metal band that uses both native Brazilian and Portuguese instruments.

Chile
Alejandro Silva - Instrumental heavy metal guitarist of the Alejandro Silva Power Cuarteto.
All Tomorrows
Atomic Aggressor
Criminal
Coprofago
Decrepit Cadaver
Dorso
Fahrenheit
Fireland
Massakre
Necrosis
Nuclear
Pentagram Chile
Poema Arcanus
Recrucide
Six Magics
Steelrage

Colombia
Kraken - Founded in 1983.
Parabellum
Ekhymosis
Agony
Koyi k utho
Internal Suffering
Inquisition
Masacre

México

Agora
Resorte

Puerto Rico
Puya
Severe Mutilation
Athaxia
D.O.D. (Dealers of death)
Abismo Nuclear
Dantesco
Nonpoint
Back In The Day
Pit Fight Demolition
Machete
Zafakon
Death Arrangement
Outbreak Hate
Sepulchral
Godless
Rodney Infernal
Massive Destruktion
Voracious
Matriarch
Waves of Serenity
Mantarraya

Venezuela

Laberinto
Gillman
Arkángel
Cultura Tres
Freddy Marshall