I don't know if anyone thought about it but what about a class themed around giant and being big?
The following theme would be something like attack on titan :

- stomp : you crush you ennemies near you (1 or 2 case around the character)
- grab and throw : you can grab your ennemies and throw them into their allies (work with your mates for more fun ^^)
- Smash : you smash your fist on the ground creating a shockwave in front of you (damaging everything) and stun those who are near you.
- passive: as a giant, you are big, so does your step : it take you less point to travel long distance in fight.
- passive 2 : you are giant, so you have more defence, hitpoints and physical defence than other races but you have a lot less magic and agility.
- giant charge : you charge in a straight line, damaging everything in your path, if you collide against a wall, you create a big shockwave damaging everything around you but you have a percentage of being stun by doing that.
- a giant can't sneak and pickpocket people, it's pretty obvious...
- Mother Earth : as a giant you have a better affinity with the earth element, you can cast a protective armor, protecting you from incoming damage.
- Giant taunt : you taunt all the ennemies in a large area, forcing them to attack you instead of your allies, gain bonus defence per ennemies taunt (flat bonus or percentage bonus)
- A giant can't equip bow or other archery weapons, he can't equip weapons like daggers and shortswords...
- A giant can equip all kind of armor except of magician type of armor (robe for example)

- Start bar ended

- the size of the giant depend of it's level, some spell's range increase as your size increase, your hp, strength, defence increase too but your agility, speed overall and magic doesn't increase at all.

Those are just ideas for the moment, if anyone has other ideas, feel free to post them.
I sadly won't be the one creating the mod or else I wouldn't do this post in the first place, this is just a request to the modding community. :)