| The Gentle Storm |
Netherlands |
Symphonic/Progressive Metal/Rock |
23 |
| The Gathering |
Netherlands |
Death/Doom Metal, Atmospheric Doom Metal (early); Atmospheric Rock (later) |
21 |
| Oceans of Slumber |
United States |
Progressive Metal/Rock |
14 |
| Stream of Passion |
Netherlands |
Progressive/Symphonic Metal |
14 |
| Kingfisher Sky |
Netherlands |
Progressive/Symphonic Metal |
14 |
| ReVamp |
Netherlands |
Symphonic Metal |
11 |
| Amaran |
Sweden |
Power Metal |
7 |
| Autumn |
Netherlands |
Gothic Metal (early); Atmospheric Rock (later) |
7 |
| Dark Horse | White Horse |
Netherlands |
Symphonic/Progressive Metal |
6 |
| Inno |
Italy |
Gothic/Doom Metal |
6 |
| Echoes of Eternity |
United States |
Progressive Metal |
5 |
| Ayreon |
Netherlands |
Progressive Metal/Rock |
3 |
| Miserium |
Hungary |
Progressive Metal |
3 |