im looking for SOME computer game distributors who sell major
Massively Multi-player Online RPGs such as World of Warcraft,
Everquest.

some requirements:
1. allow me to place order online.
2. sell at wholesale prices.
3. have large inventory

I would strongly suggest you apply to become an Ingram Micro reseller.

http://www.ingrammicro.com/

They offer a wide variety of video games and usually carry
considerable stock. Their prices are hard to beat and their service is
zippy.

You can take a look at lists like this one:
http://www.vgyellowpages.com/category.asp?cat=Distributor

...although most of the names there won't lead you to serious or
otherwise established companies. Stick with the leader!