heres my very vague overall tier list looking at classes as a whole in all forms of content - leveling 1-65, solo/duo, exp group, 6 man, raid (all tiers)
excels at all forms of content tier:
warrior
sk
paladin
druid
beastlord
strong in most forms of content:
cleric
mage
necromancer
generally strong but has obvious pain points (typically solo, duo, or exp):
bard
monk
ranger
rogue
insanely good in some circumstances but feels exceptionally bad in others
shaman
enchanter
wizard
reasoning:
excels at everything tier should be more or less self explanatory. I think you could argue beastlord and paladin could move down a tier but its splitting hairs tbh.
strong in most forms tier feels self explanatory as well. Cleric could arguably move up one tier but druids feels so much better to play outside of raid. it feels hard to put cleric in the same tier when they get gapped that hard. mage could arguably move up a tier as well, but its a weaker solo/duo class than the others.
generally strong tier - ranger and rogue should be pretty self explanatory here. both aren't great at duo, ranger isn't anything special while leveling and is one of the weaker dps classes in exp grind settings. bards are in this tier because while they're insanely good in raid / 6man / exp group, they are one of the weaker classes for solo/duo (particularly at low gear) and don't feel like they contribute a ton while leveling. monk can arguably move one tier up, main reasoning for it being here is it just feels like a worse version of warrior while solo/duo and is generally more reliant on gear (and buff support) than a lot of other classes in order to feel powerful.
bipolar tier also feels self explanatory. shaman is outclassed pretty noticeably by the other 2 healers in solo/duo. really nice class to have while leveling alongside another healer. however in the raid/6man situations where this class is good its hard carrying your entire raid so much that you should thank your shaman player for allowing you to even breathe the same air as them. the other half the time in raid/6man they're just roleplaying as a bad dps class or worse druid. enchanters. I haven't played with wizard since forbidden harvest change, but from what i can tell they are a lot worse at what used to be their niche in raid (mechanics doer add killer guy). Its also a class that feels like it really doesn't function properly without a certain level of gear / exp investment. it doesnt have any utility to make up for the fact that there are points in the game where its just not that good at the thing its supposed to do well: damage.