We've skied in Obergurgl with Esprit with DD and used their listening service, transfer time was good but Esprit are on the expensive side, as you say.
Also skied with Le Ski in La Tania who have childcare, but not in the evenings - but they do tend to have very civilised flight times.
Neilson have ski holiday which offer evening childcare in Les Deux Alpes (we haven't skied with Neilson) - one evening free, then you pay per evening used. But I think their evening childcare is from 11 months, so it depends how old your DS2 is?
I've heard lots of people talk on MN about a company called Family Ski, so might be worth looking at them. I think they offer chalets, so evening childcare might be less of an issue as you're closer to your room than in hotel.
We're looking at Crystal (probably Tignes) as they have childcare, drop at ski school etc. and some of their properties offer a snuggle club 3 nights a week. IIRC the flight times were quite good.
For us, transfer time is probably going to be the thing we compromise on and we'll relent and let DD watch TV programmes loaded onto the ipad.
Be interested to hear what others might suggest, or what you decide on, as it's so difficult to find a holiday that has good skiing, is reasonably snows-sure, reasonable transfer time, good childcare/ski lesson combo for children, evening childcare option and is affordable!