I'd just call with AJo in early position nearly 100% of the time. Would AK/AQ/QQ+ cold call behind at this table, or reraise?

I don't think there's much value in 3-betting the turn. Similarly, you're not going to fold these players, so the raise protects nothing. I'd just call to close the turn action (2 bets that *could* be used to showdown).

But, had the river action remained the same, I'd probably check/fold the river too, expecting to lose to either KQ (MP2) or JT (button). I'd call 1 bet on the river, preferably an action closing bet.