In my opinion, there are different "best players" in different eras of this game. In the WOL time there was a lot of good players. After that Tomislav constantly dominated the ladder. Then Marko came up and some other. Also you have to recognize the improvement in the skill level on the top -> a good demonstration for this was the hard comeback of tomi. He came back and developed again to a top player, but didn't reached no1 again i guess (XWIS).
On the other hand, you have to recognize the skill level. I guess, the top 10 skilled players nowaydays could easily win the ladder back in 2007. Because the skill-peak moved very slowly but constantly forward. Suprisingly was moon3, who shifted this extremy high peak (Marko, Latof, Matt, Marsh etc.) again forward to a new level. He demonstrated this by dominating the TOP-XWIS player in the past years. This was very impressiv in my long career, even though i was usually a yuri-player and rarely on ra2.
Also the difference between ra2 and yr should be recognized related to the top-skilled players, even though the difference is not big.
Finally, i would say... we had different eras of skill-peaks and different eras of astonishing players. For my personal decession, Tomi was owning the scene where the attention to this game was not at the bottom and the competition was relatively high. Also the extend of his domination was astonishing, even though i hate his very childish personality. On the other hand, the overall-skill of Marko and some others players demonstrated that the game, respectively the skill level is not frozen.
At the end: The best Player over the last 17 years was clearly ZigZag - Noone moves tanks more sexy than him. Maybe he would probably train me again when i have some time for yr on cncnet (sandoo)