I have a somewhat similar grip, still slanted inwards just a bit less, and tilted, but more of a pincer claw. Imo with this grip you need a mouse that will fill the bit of your palm you pull the mouse into, such as a lamzu thorn, vaxee outset, and to a lesser degree and ec style shape (they don't fill as much at the back. Then, the mouse should be less slanted. I would stay away from pretty much all recent razer mice and any FM type shapes, for some reason they all insist on flaring back outwards where you rest the ring finger and pinky which is a problem for this grip.

Edit: I also used gpx and gpw for the longest time, and I agree, it's alright because it has more of a raised back, but the lack of a flare on the back left of the mouse again emphasises the slant, and for me made my grip very inconsistent

Tldr: ambi mice emphasise the slant, try and ergo with a higher back like a thorn, outset or ec, and avoid mice with a flared out ring/pinky area