- Obituary
- Obie Trice
- OBK
- Obadja
- Oblivia
- Obliveon
- Obsidian Voice
- Obel
- Obtained Enslavement
- OBLIVION DUST
- Obtest
- Oberhofer
- Obscure Disorder
- Obús
- Obsidian Gate
- Obscura
- Oberkrainer Power
- Obie Bermúdez
- OBB
- Obadiah Parker
- Obey the Brave
- Obsession
- Obscure Vortex
- Obliteration
- Observer Drift
- Obsc(y)re
- Oblivion
- Obamagirl
- Obscurcis Romancia
- Obits
- Oblomov
- Obscure
- Observe & Control
- Obie Trice & Cashis
- Obessions
- Obywatel G.C.
- Obsidian Kingdom
- Oblomow
- Obecana Zemlja
- Obsequiae
- Obeco
- Objetivo Birmania
- Oberer Totpunkt
- Obsidia
- Oba Oba Samba House
- Obsessive Compulsive
- Obi Best
- Oberschlesien
- Obscure Anachronism
- Oberon
- Obskure Torture
- Oblivians
- Obeses
- Obi
- Obersoundz
- OBO & Sol Luna
- Obscenity Trial
- Oblique Brown
- Obrint Pas
- Obo & Jorge
- OBS
- OBOY