I think that the heel on the Hiangle is quite deep. In fact, it locked so hard on my foot then when I tried them on in a store I needed assistance from an employee to get them off my foot. Based off of other shoes you have tried, it sounds like you have shallow heels, as the Shamens have a fairly shallow heel and fit you well, and the TN pros are pretty deep and were baggy. I think your best bet will be to look for models with shallower heels which can be hard to find in bouldering shoes.
Here is a list of some good options to look in to:
Scarpa is probably your best bet, especailly if you have narrow feet. Almost every shoe has a farily shallow heel, I would particularly look at the Drago, the Instinct VS for a stiffer option, and the Instinct VSR for a softer option.
Tenayas could also be a good option, they all run on the softer side and while I am less familiar with their range than other brands, I believe that the Oasi, Iatai, and Mundaka all have farily shallow heels. The Mastia heel is not too deep but it is very wide, the Indalo is quite deep.
I would avoid all the UP models besides the regulus, but the regulus is on the stiffer side and probably not what you are looking for.
From La Sportiva: the Genius, Futura, Testarossa, and Theory are all on the soft to very soft end with shallow heels. I would avoid any shoe with the S-Heel like the Skwama and Otaki, and the Solution heel may be too deep. If you are interested in the Solutions, make sure you try the Solution Comp because they actually have a lower-volume heel than the standard model and may fit better.
The Gamma and Enzo from Acopa could also be good options. The gamma is one of the widest bouldering shoes on the market if you need the extra room.
Hope this helps!