Gaskets and seals 04 tundra double cab SR5 TRD RWD V8

I have a 2004 tundra double cab SR5 TRD RWD V8 4.7 with 235k I have an excessive amount of oil that is leaking in the left front corner I'm in the process of tearing down the engine to get to it, originally thought valve cover but now not sure could be cam seal, head gasket, oil cooler, possibly oil pan but doubtful being so low. At this time I'm going to do them all given its age and miles ,all except oil pan for obvious reasons that is. Wondering what else I should do at this time I'm doing water pump, timing belt, valve cover gaskets, cam and crank seals, spark plug tube seals, intake manifolds, head gaskets, spark plugs, ignition coils, power steering pump ( where I found an end cap lodged in the pump , this most likely being the cause of leaking lines,

 

Check your oil cooler o-rings it’s a figure 8. Right next to the oil filter

 

"...I have an excessive amount of oil that is leaking in the left front corner..."
Im no mechanic, but just curious how 'excessive' is it for 235k ?
Im @175k and will have any accessible seals, gaskets & hoses [oil cooler] replaced while doing TB/RAD/H20Pump/ValveCovers.
Yours sounds like a 90% TopEnd rebuild, excluding head work.
If I recall here, @KNABORES had some fine cracks on his exhaust manifold flanges and ended up replacing both manifolds with aftermarkets that he said were very good [$ & quality] for not being Toyota. Might be worth a look if you will r&r heads...

 

@USERidiculousNAME

Oil pan rarely (virtually never) leaks.

For V8:

Valve covers often leak, runs down the dipstick, and to the bottom of the engine on the driver's side, ALL THE TIME. And everywhere else. Especially for people who can't read the fucking manual and properly seal the front corners with FIPG as Toyota asks.

Oil cooler figure-8 shaped seal often leaks and drips behind where the oil filter is, common enough most people know about it.

Cam seals on the front of the engine will leak down front of engine on either side, less common, but it happens enough it's a thing to proactively replace, not hard for 2000-2004, more tedious with 2005-2006.