I would advise a less obvious answer: no gasket/seal at all!
I (and almost all members of our swimming team) was using the well known Swedish goggles. They come unassembled, so you have to assemble them by yourself but can then adapt them perfectly: single or double rubber strip around the head (I used two, one quite high on the head and another one quite low, but you may prefer something different), size and length of nose piece, which will help both cups to stay in contact with your skin when the length is correctly adapted.
Despite what most people think, they are not less comfortable than other goggles but really have to be well assembled to your face's dimensions. So, lots of trial and error but you'll end up with a tailor-made goggle. Bring everything you need to adapt them directly at the pool, so you can modify nose piece length, try for 50 meters and adapt again if needed.
I didn't check recently but I think some (most?) of the current competitive swimmers still use this kind of goggles and they swim quite vigorously!
You can even be fashionable and use two cups of different color should you want it!
And best of all, being just two plastic cups, a strap and a piece of string, they are quite cheap!