What I mean is, what class is the best Healer, Tank, and DPS?
Fighter
Swordsman
Crane Hermit
Turtle Hermit
Dark Warrior
Shadow Knight
Dende Priest
Poko Priest
Ultimate Majin
Grand Chef Majin
Plasma Majin
Karma Majin

Healer: Dende (However, Poko can heal too)
Tank: Shadow Knight
DPS: Depends on version and multiple factors can change this.

dende is the best.

poko is great tank and supporter

most wanted classes are dende and buffers/mighty majins

best healer Dende (Ep heal and highest healing ability)
second best healer Poko (has heals but cant compare to Dende in healing)

Best Tank Dark Warrior(specially for farming and doing a lot of AoE dmg)
Best Tank Shadow Knight (because of Aoe Stun and high duration taunt, not many Aoe)

Best AoE DPS Turtle(two OP kamehas, and many more AoEs with great crit and dmg)
Second Aoe DPS Plasma (has some very good AoEs to deal dmg)

Fastest speed DPS Fighter (thunder + blist fist + speed weps = OP speed)
Second speed DPS Poko (best speed buff for speed party)
Third speed DPS Karma (great AoE speed buff. when combined with poko makes a fast party)

Best buffs Ultimate (THE best buffer in my opinion. can also do well as a tank)
Second buffs Chef (has better dmg than Ult and has dex and con buffs, more dmg buffs(chef) than survival buffs(ult))

Highest 1 vs 1 dmg Swordsman (I believe SM can probably do the highest crit.)

Highest DoT Aoe dmg Crane (their DoT are deadly. can use burn or bleed.)

Highest DoT 1 vs 1 dmg Shadow Knight (Bold Strike, % based DoT = OP)


ok that pretty much sums it up lol.