Oof, such outdated-ness. Well... actually Vant, Seir and Faetali still look exactly the same, they just have a lot more art and I've classified Faetali and Seir as secondary sonas.
Now I have more characters than I can count to be honest, but my four main fursonas would be Vant(Who still needs an official ref with lineart by me even after 2 years), Dirge (
https://toyhou.se/1525747.dirge), Glacier (
https://toyhou.se/1585497.glacier) and Aegeus (
https://toyhou.se/1631213.a-geus)
I admit, Vant is like, my personal fursona. I don't draw or write about him much, I don't get much art of him, but I still feel very connected to him and his design, though there have been light color changes, but very minor stuff I didn't notice when I first designed him. Meanwhile Dirge and Aegeus hold veey similar roles, kinda representing two sides of the same coin. They're both the character I love getting art of the most and they're the ones who I'd want to have a fursuit of if I ever got one, but Dirge is a neutral chaotic rogueish character that gets in trouble all the time for stealing things his tail (the plant has mind of it's own by the way) took. Meanwhile, Aegeus is very calm, very quiet. He prefers nature and tea and reading over the rambunctious trouble of the city. Finally, Glacier was a character I developed for a closed species I'm a part of. He was never originally going to be a fursona, but I found that I grew super attached to him and he just kinda ended up that way.