I'm not sure of the criteria here for community coins but f0me's attempt to create a form of Proof of Community was an interesting community experiment until it died. I would pull the forum statistics to show what a small community can achieve in such a short amount of time, but the plug has already officially been pulled.
When it's comes to best community then I'd have to say DeepOnion would win my vote, with over 12,500 members and filled with
free giveaways,
contests,
bounties and a
regular lottery not to mention
weekly airdrops, it's hard not to fall in love with what's going on there. It's nice to see there are many people there that don't have enough (or any) onions for the airdrop but enjoy being a part of the community and being involved. Gradually they will earn, buy or win their onions to join the airdrop. There's isn't another community-based coin like it in my opinion.