Looks like he's head is back with a nice wide mouth and nipple further in, so likely at the palate rather than front of the mouth (likely why pain has stopped). Looks good from here!
A perfect lacth is a perfect O nipple after latch. And oval is too shallow. 👌
That looks like a good latch to me! Mouth covering the nipple and cheeks puffed out which is what you want 🥰