- Ol Dirty Bastard
- One
- Oscar
- Ortiga
- Obscurity
- Old Man Luedecke
- Omela
- Oppressive Light
- Oh My O
- OKNUW
- Oscar Pettiford
- Once Blue
- Orealis
- OKAMOTO S
- One for All
- Ot Azoj Klezmerband
- One More Victim
- Ondskapt
- Opus Doria
- Os Paralamas do Sucesso
- Old Man Gloom
- Oubliette
- On Fire
- Oscar Castro-Neves
- Orange 9mm
- Olam Ein Sof
- Ok Ikumi
- One Cent
- Ofrin
- Osoyi Rizumu
- Oliver Ho
- Orphanage
- ONE DAY DIARY
- OVER ACTION
- Orange Blue
- Officium Triste
- Ohana
- Optimus Prime
- Odes Of Ecstasy
- Organic Cage
- Opus Nigrum
- 欧阳靖&Tim Be Told
- Olivier Ker Ourio
- Overdrive
- October Gold
- Oliver Putland
- One Two Three Cheers And A Tiger
- Ode
- Oh My!
- One Without
- Oxbow
- Overflow
- Old Forest
- One Way Mirror
- Our Lady P
- Orihouse
- Ostara
- OT乐队
- Obsequiae
- Odal
- Origa
- Oliver Jones
- Orange Plane
- OBK
- Odd Nordstoga
- O.R.B.
- Oono Yuuki
- One-Eyed Doll
- Orkrist
- 欧逸
- Obehag
- Optimo
- Olivia Newton-John
- Oscar Benton
- Ossastorium
- Obscurcis Romancia
- 欧阳大龙
- Orrin Evans
- Owana Salazar
- Over It
- Orange Sector
- Omnicore
- Octavia Sperati
- Ordo Templi Orientis
- Oerjgrinder
- O Town
- One Day as a Lion
- OORUTAICHI
- Outloudz
- Of Porcelain
