The Caller
Like "despot" & "tyrant" they carry ... negative connotations.I disagree with your comparison here. None of those terms indicate or imply rank.
"So what class are you playing?"Makes me think of the board game.
I believe it's actually taken, sorta, at this point, isn't it?If it were called Sidekick I'd be all for it.
Even the thread to homebrew a marshal martial leader class, based on the result of this thread, says "Warlord" twice in the title, rather than using 'marshal' or 'leader class,' at all.I don't like it best, but now Warlord is set in DnD 'lore' so let's stick with it.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.