I first took the full realm list. Narrowed it down to PvP servers with Medium/High/Full population. Then I listed the amount of guilds (A and H) with 4/5 Heroic TOC+. Then I listed the amount of 2v2/3v3/5v5 teams were above 2.2k for both factions.
This is what I came up with:
I narrowed it down to servers that were good at PvP for alliance:
I also did it for horde if anyone was interested:
(Right click/View Image to see the pictures clearly)