Those are good ones. IMHO of course.
Ever use Mouse Milk? https://www.amazon.com/Mouse-Milk-Oil-8-Oz/dp/B0049C7170
We used to use Mopar Heat Valve Solvent or Penetrant, forget the exact name, on aircraft turbocharger waste gates. Spray in on, let it sit and then hit it with an air rivet gun with a 2x4 in between.
I have not heard of the Mopar Heat Valve Solvent since the late 70's when I worked at a Dodge / Chry / Plym dealer ship in the body shop.
Kroil works great when I used it in HVAC at a hospital and would be my go to if I could find it on the store shelves.
I have PB Blaster on hand but don't think it works to good as it seams to dry out if left to soak in.
Also not happy with Liquid Wrench.
I have some ATF & WD-40 mixed that I was pouring in plug holes on a stuck motor, have not checked if it worked yet?
Dave ----
I agree on the Kroil. Another that impressed me was Pyroil penetrating oil. I haven't seen it lately either.
http://pyroilchemicals.com/products/pyroil-penetrating-oil