Band
| Namn | Land | Skivsläpp |
|---|---|---|
| Overkill |  |
45 |
| Opeth |  |
41 |
| Orden Ogan |  |
26 |
| Omnium Gatherum |  |
25 |
| OUTRAGE |  |
24 |
| Onslaught |  |
23 |
| Obituary | |
22 |
| Orion's Reign | |
21 |
| Odal | |
18 |
| Otargos |  |
17 |
| Officium Triste |  |
16 |
| Orange Goblin | |
15 |
| Om | |
15 |
| Old Man Gloom | |
15 |
| Obsecration | |
14 |
| Overdrive | |
14 |
| Obscura | |
14 |
| Oz | |
13 |
| Ordinul Negru |  |
13 |
| Orphaned Land |  |
13 |
| Omen | |
12 |
| October Falls |  |
12 |
| Obscenity | |
12 |
| Opera IX |  |
12 |
| Old Man’s Child |  |
12 |
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