Here is the class breakdown for gladiators across the past three seasons. This is the gladiator data we have gathered from the users registered on our site, not the hall of fame. Once the hall of fame includes season three, we will do a more accurate listing. This still should be representative of the whole considering how large of a sample size we have here. Thanks again
Pigvomit/Hoove for the request.
Season One Gladiator:

Warlock: 88 - 17.96%

Priest: 69 - 14.08%

Warrior: 68 - 13.88%

Paladin: 62 - 12.65%

Rogue: 56 - 11.43%

Mage: 50 - 10.20%

Druid: 37 - 7.55%

Shaman: 33 - 6.73%

Hunter: 27 - 5.51%
Season Two Gladiator:

Warlock: 352 - 16.67%

Priest: 320 - 15.15%

Warrior: 316 - 14.96%

Rogue: 311 - 14.73%

Druid: 215 - 10.18%

Mage: 195 - 9.23%

Paladin: 189 - 8.95%

Shaman: 129 - 6.11%

Hunter: 85 - 4.02%
Season Three Gladiator:

Rogue: 687 - 18.00%

Druid: 622 - 16.30%

Warrior: 592 - 15.51%

Priest: 489 - 12.81%

Warlock: 399 - 10.46%

Mage: 333 - 8.73%

Shaman: 265 - 6.94%

Paladin: 216 - 5.66%

Hunter: 213 - 5.58%
Gladiator Two of Three Seasons:

Warrior: 171 - 16.35%

Rogue: 163 - 15.58%

Priest: 159 - 15.20%

Warlock: 158 - 15.11%

Druid: 107 - 10.23%

Mage: 101 - 9.66%

Shaman: 74 - 7.07%

Paladin: 66 - 6.31%

Hunter: 47 - 4.49%
Gladiator All Three Seasons:

Warlock: 25 - 16.23%

Rogue: 24 - 15.58%

Priest: 22 - 14.29%

Warrior: 22 - 14.29%

Paladin: 19 - 12.34%

Mage: 19 - 12.34%

Druid: 12 - 7.79%

Hunter: 6 - 3.90%

Shaman: 5 - 3.25%