Guild Wars 2, definitely. I wouldn't really want to play two MMOs at the same time, but FFXIV and GW2 really do different things, they don't feel like the same type of game at all.

It's too bad you reject Elder Scrolls Online, as it's a really cool game actually. I get how you feel about the art style though. I feel like the Elder Scrolls series in general tries really hard to make its characters super ugly, and I don't know why. Still put hundreds of hours into Skyrim though. In fact, you know what you should do? Play Skyrim with some graphics mods to make the people prettier. It's a good time! Also get the Inigo mod so you can have a loveable catboi follow you around.