Gabriel, your drawing isn't that bad. You can clearly see what you are aiming for. Heck, any attempts of mine would have looked like a cross between bluesman John Hurt and an Ewok of some kind.
I'm smack in between B and D. I have the odd need to get the very lowest part of my lower lip slightly
in the hole and have the embouchure hole slightly tilted towards me, less than in the drawings.
I don't know if position this is a carryover from years of playing bansuri or a subconsciously need to find a consistent place to "set up" my lips, but it works very well for me. My position doesn't seem to vary from flute to flute. It gives me reasonable volume and wide dynamic range (if needed) and can get a broad spectrum of different tone colors.
My flute is a 6 key M&E Rudall Rose copy, which I've played for a few years now and rather pleased with. It has a 12 cm embouchure hole, ovalish and slightly asymmetrical l like the originals I've seen, with medium size tone holes. It does what I ask of it without undo cajoling.
One rule of thumb I go by: the embouchure focuses the higher I go, and "broadens" the lower I go, and the lowest notes get more breath force.
Elegantly put. I do much the same thing, with my upper lip slightly out over the lower. But odd as it sounds, on the lowest note, I try to focus on a very specific spot which seems to blow into and through the whole instrument getting a nice bright hard low D.
As Brother Nano implied, individual results may vary!
B&D...
Jimmity Christmas! You think you know a guy after a few years....
