Would it be possible to add a player variable to the tppos command? So you can force players to a specific coordinate in a specific world via console commands that auto-replace a %player% placeholder with the player name?

i.e.

/tppos <x> <y> <z> [yaw] [pitch] [world] [player]

With a condition if [player] is used, don't teleport yourself -- check for that player instead.

Couldn’t you use /tp [player] (x y z)?

The command that Leomelonseeds mentioned should work fine. If you still insist that this should be in Essentials itself, feel free to make a PR.