| Band |
Genre |
| Amaranthe | Power Metal |
| Amon Amarth | Black/Death Metal/Hardcore |
| Amorphis | Progressive Metal |
| Anathema | Alternative Rock |
| Andy James | Instrumental Rock |
| Andy Timmons | Instrumental Rock |
| Angel Witch | Heavy metal |
| Angelus Apatrida | Thrash Metal |
| Angra | Progressive Metal |
| Annihilator | Thrash Metal |
| Anthrax | Thrash Metal |
| Anvil | Heavy metal |
| April Wine | Hard Rock |
| Arch Enemy | Black/Death Metal/Hardcore |
| Artillery | Thrash Metal |
| At the Gates | Black/Death Metal/Hardcore |
| Avantasia | Symphonic Metal |
| Axe | Hard Rock |
| Axel Rudi Pell | Power Metal |
| Ayreon | Progressive Metal |
