Most things that eat mosquitoes are actually in the business of eating any flying insect that fits in their mouth. I'd be a bit more worried about, e.g. a species being the only pollinator for some plant, but that's pretty unlikely. Do the studies, sure, but don't expect any bombshells. And if aedes aegypti or any of the other big disease-causing mosquitoes had such a role, I'm pretty sure it would have already been found and trumpeted to the heavens.
The fact you can't even confidently say whether one of those species is a sole pollinator of a plant or not indicates that your comment is still just a stack of assumptions.
And yours is still just fearmongering supposition, with, in my opinion, even less basis in reality. Go find some actual research on the ecological roles of aedes aegypti and anopheles if you want to get out of the loop. :)
Do we not know because people haven't gone looking, or because they did go looking and didn't find it? I'm guessing it's the latter, in which case it kinda strengthens the case that there probably isn't some critical role. These are some of the more-studied animals on the planet.
Pointing out risk is a kind of fearmongering when it's technically real but too small to be worth worrying about. Asteroid impact is a real risk too.