Suggestions

Tantra Online: Indian mythology themed MMO, ally with Shiva, Brahma or Vishnu. 4 (?) classes to play. Currently hosted officially.
https://tantra-online.com/

Redmoon Online: Isometric 3D MMO from 2000. Based on a manhwa. Cool urban scifi art and aesthetic, play as 9 individual characters each with different skills dependant on your karma. Ran an english server back in the day but was destroyed by hackers in 2001. Runs on a private server (there are two private servers but I forget the second one)
https://rmadvanced.com/#

Survival Project
Top down action RPG, cartoony cel graphics, 12 character 3 (on each element) to play, simple 3 card equip system. Runs on a private server.
https://www.spgenerations.com

Soul of the Ultimate Nation (SUN)
2007 MMO, had very good graphics for its time, got a reboot a few years ago that makes the game more bearable like being able to farm endgame stuff and premium items in dungeons. Webzen runs it currently.
https://sunclassic.webzen.com/en

ROSE Online
Rush on Seven Episodes Online, MMO from 2005 by Triggersoft who got bought by Gravity, had a vehicle crafting system, 4 classes. Died for real in 2021 but was exhumed by Rednim games.
https://www.roseonlinegame.com/