Intermittent coolant leakage and overheating

Attempting to diagnose a relative's 2007 sequoia (4.7 v8). I'm guessing it's either the water pump, radiator, or potentially a hose in between, although I'm doubting the hose...and here's why...

So apparently this thing is overheating and leaking intermittently, and progressively got worse over a 2 year duration. At first it would leak a small amount every once in awhile, then more as time went on, then for weeks it wouldn't leak a drop, then would start back again. It was stated that at one point they had driven it about 10 miles and parked it...no issues whatesoever then returning to find a pool of coolant under the engine (towards the front). After this they filled it and drove it back home, while doing so the temperature would rise towards high but come back down staying in a range that was safe to make it back (never completely pegging to high).

After sitting a few days they would drive it again as no coolant would be found underneath it and it would be fine. Then out of the blue it would happen again where when driving the temperature would rise up to high, then come back down and after being parked coolant would be found under engine.

I was told that when parked on an angle where engine was pointing down hill, that when it leaked, the puddle would always be larger.

Anyone have any suggestions as to what might be the culprit? As previously mentioned my money is on radiator being toast, maybe at one of the tank seams, or the water pump gasket being out, although if it were a water pump gasket I'd think it would be consistent instead of intermittent, which is what lead to my radiator tank theory (as the plastic could be expanding and contracting in a way that could cause the intermittence??? IDK???)

Might do a pressure test to see what that yields if there isn't some common issue with these engines that jumps out as being a likely culprit to anyone.