One character only TLP, this is interesting. Bard useful in groups, can solo kite, can get to places, charm things, slow things, snare things, can melee, CC mez? can't go wrong. Gnome bard if that was possible ultimate tradeskiller. Oh illusions, illusions that stay zone to zone, bards! Need an ocarina of time bard song, portal self to zones.
Probably SK because its the only thing im good at. I try to play something else ill probably just get mad and go play fortnite.
If I (as the only one) could only play one character (and the bozos are still free to make bot/box armies) - probably something that can solo, since so many people are their own group. I'd go Necro or Shaman. If EVERYONE could only play one character, I would be a healer. Shaman, Druid, or Cleric
Berserker. It's just the best class. Need DPS? Berserker. Need a puller? Berserker pulls 10 mobs easy. Need CC with 10 mobs in camp? Berserker burns to kill things fast. Need a tank? Berserker can tank just fine for anywhere between 30 seconds to couple minutes. The cleric needs a break to rez the tank anyway. Need a healer after the cleric quit? What berserker doesn't have a shaman friend or 12?
Ranger. Unfortunately I'd have to race-change once Halflings regained the ability to be Rangers, as Elves and Hummies aren't as fun to snipe with. Arrows need to plant themselves in kneecaps, not skulls.