I'm hedging my bets on Samurai with a skillset centered heavily on counter-attacks. They could also go the Rune Fencer route like in XI, but that job was all about the elemental wheel which is barely existent in this game.

Ranged tanks sound just awful. In current content, the sky seems to fall whenever a tank rotates/moves a boss slightly or a MCH/WHM uses their push-back on trash. Do we play the same game here? I can't even imagine what kind of nonsense a ranged tank would make us deal with. They would have to have a perma-bind effect or something, but even that would allow them to bypass auto-attacks and virtually all close quarters boss mechanics, which is... kind of the point of tanking.