Player rating for tournaments across all installments of Heroes.

Personally, I would suggest including all organizers, winners (they are experts), and those who participated in a certain number of tournaments (e.g., 5) during the year in the voting process. The main thing is that the selection should be based on an objective criterion, and not just because someone is a nice person.

For example, I might not be included in the committee, but why shouldn't I have the right to choose how my rating will be calculated?

It is very difficult to satisfy everyone's wishes, but any regular tournament participant (and therefore you personally) will be able to influence the choice of the system.