I don't think such logs exist. There's guides on how to set up worldoflogs for yourself/your guild and I've seen worldoflogs posted from time to time in bugtracker reports, some from retail, some from warmane, but it's not very popular.
As Overloard99 said, the usual consensus around here is that top DPS classes are Fwarr, fmage, mmhunter and crogue, after that it's a mixed bag. Those classes work very very well. That doesn't mean rest of the classes are bad, it's like a few hundred dps difference mostly.