V1: Stack of $300, Mid 20's guy. Pretty straight forward player, bets/raises when he thinks he is in front. Check-calling/folding marginal hands on scary runouts. Won't value bet thin.
V2: Stack of $40, straightforward nit. Check calling K-high flush on non paired board with 3suit on board in a pot few orbits earlier.

Hero: Stack of $450, playing TAG and probably most competent player on the table. Close to 100% showdown winrate this session, correctly valuebetting thinly, bluffs havent gotten to showdown. Overall great session so far.

OTTH

Hero looks down at AA UTG and opens to $11.
V1 UTG+1, V2 UTG+2, V3 on BTN and V4 in BB all call.

Pot($56) Flop: T23r, Really can't ask for a better board for Aces. Trying to keep ranges wide and realistically either way ahead or way behind. So c-bet $25. V1 calls and V2 jams for $4 more. V3 & V4 fold. I call and V1 calls.

Locked pot($143), Turn is a 5 completing the rainbow. Hero checks, V1 bets $70.

Given its a locked pot, V1 shouldn't be bluffing here. However, hero still beats some of his value range such as Tx's, although we double block AT- /JJ/QQ too although the overpairs unlikely. Hero also has little equity against some weird two pairs, very thin against sets and dead against a straight. Given that, what is Hero's best line here?

Keep betting until you get raised.

Call, check river. You are underrepped and your c-bet was weak. And if V2 is that straightforward, he could well have raised a set on the flop. But you may have to give up to a river bet.

I know the board is dry, but I like a bigger c-bet 5 ways.

Are we really thinking of folding aa here???
Why oh why do we not bet the turn?
You say in your opening post you are correctly value betting thin...yet miss an obvious value bet on the turn here....
I would have bet slightly more on the flop,so that when your short stack jams there is a side pot to bet into on the turn.....
Generally with AA oop the line is raise, bet,bet,bet, and you should only deviate if you get raised, or if the board gets V-scarey..... Neither of those happen so, bet the turn...
As played our hand is under repped,we have to call, and check calling river I think aswell, although as I mentioned we are getting our selves into a tough spot by giving up our lead and control if this hand.

I would lead the turn here and fold to a reraise. As played I think I would fold to this turn bet.

Villain as described does not appear to be the type to be the type to value bet effectively. Given that and the fact that we are likely going to have to pay off a river bet , I would get away from this.

Also note that since we have an all-in shorty here, it will cause many straightforward recreational players to be much more passive here. I would guess v1 has at least a set here.

Your best line to get value from his range is clearly to bet again. Size down to keep him wide and give him the illusion that you might somehow be barreling some sort of AK hand into the field that just added equity/might be able to win both pots.

What you really shouldn't be doing is poisoning your own value well by altering your line based on hands that beat you on one of the best boards for AA you can find. You are looking to find as much of his calling range as possible for the remainder of the hand, and sizing for such should be the prime directive.

AP don't fold turn and don't fold river either unless you're absolutely certain he can not be betting worse for value.

These statements together mean you're at a table full of certified fish which in turn means you need to be pounding away fat value bets with AA, not checking, ever.

I have to agree with everyone here, in that you should be betting and not checking this turn. I know what you're doing by checking and just letting V1 try to get to showdown with just a dry side pot. I get that, but I think doing that is more for tournaments when you are trying to KO a player and pay jumps are big. As played though, in this spot I say just jam over top of him.

A bet on the turn would be ideal, but as played I think you have to call and check/ call most rivers.

This was exactly my thought process in the situation. V1 is a very timid player and in a locked pot i expect him to be much more passive and checking back a lot of hands we're beating such as Tx's for some pot control. Also had a read on him at the time, he did give a decent amount of time to tank call my flop cbet and i was instantly weary of a potential set.

Result orientated hand, given i check folded turn and he rolled over TT. I think in this exact dynamic hand with the dry side pot against this Villain check folding AA isn't the worst. If he checks back im gonna still make up value from Tx's/99/88 type hands on certain river runouts. Long term against 1/2 players with no reads, my default would be to bet the turn like everyone else is saying.

Jam over the top? That's horrible...
He's the type of timid player to potentially fold JJ here. How do you expect a hand like Tx or 99/88/45 type hands to call a jam?
If he calls a jam, he will have 2 pair+. Hands worse than AA will not call.

Call turn and call river unless he throws out a huge bet then reconsider.