The Grove isn't really that proselytising even though it wouldn't turn anyone away. Amongst other things its adherence to the fact that secular and spiritual matters should be separated could make it fit in just about anywhere where people doesn't want realm policy to be based on religion, even if I doubt it would be the most popular religion anywhere else than in Sirion.
And last thing I heard from Erik the Cleric was that he had signed up for rethorics 101 at the academy in Avamar as noone listened to his preachings. After all the flowery speeches and roleplays he has given us I found that a bit amusing.
