I know it's a band-aid fix but have you tried tongue pads? They will fill some empty space and push your foot back into the heel.
Which are similar to what you already have? Which will fill gaps in your tie collection? What do you plan on wearing them with?
If I were to choose one, it would be number 2 in the third swatch group since it would go with nearly all the suits and sportscoats I own.
That shirt is probably made by Ascot Chang. I think that fabric is a D&J Anderson, or a Thomas Mason.
DB, supergas run True to Size. And they're far more comfortable than Jack Purcells.
2nd swatch, 4th from top.
3rd swatch. any of the bottom 3.