There is no officially recognized pool for staking.
These on the list are pools that will be operated by community members, staking has not begun yet, some of them may never be launched I would guess, but it is a good place to start.
Several of the pools on the list I have good faith in, I was not aware that there would be “official” pools… kind of defeats the decentralized vision, might be officially recognized pools, but what do I know… (so much information to stay on top of).
The above does not say that IOHK will be setting up an official pool, I think they will maintain a list of legitimate pools that could be recommended to interested holders of ADA that wish to stake.
An immense amount of work has gone into the structure of staking, and pools are expected to be structured to benefit the validation process of Ouroboros, but nothing is set in stone yet, it would surprise me to see “official” pools though, that just does not sound decentralized to me, anyone can correct me if I am wrong, but the aim here is to be decentralized and “official” pools kind of has that centralized ring to it.