There has been no change in the top 3 for the last 10 years, the top position has remained unchanged for 20 years now...
1 New Model Army
2 Opeth
3 Queen
Then the rest changes regularly. At the moment...
4 Anything Swanö related (cheating, I know, but the man is a genius)
5 Porcupine Tree
Katatonia are not far behind, they would almost certainly appear in my top 20. That may not sound like much, but that is actually very high praise considering the size of my music collection.