Hi @eyox,
Just wanted to share my appreciation for, as far as I know, you adding some personal insights and research to your review... like in the competitors part... This is added value :).
For the latter... I can add to the interesting ones you referred to:
(a) those mentioned in Essentia's FAQ page;
(b) VALID: if you are interested in this kind of projects.. I wonder what you think of that one. There's a pretty good article about them here: https://www.smithandcrown.com/sale/valid-blockchain-based-personal-data-management-digital-age/
Just like essentia they seem to try and integrate data from other projects as well. (Didn't check to which extent this can also be said aboit the other competitors...)
(c) http://www.trunomi.com (not digged into this one yet).
Greetings!