I guess you'd want follow
- Felix Reda https://twitter.com/Senficon (former European MP for the Purate Party)
- NOYB EU https://twitter.com/NOYBeu (fighting the GDPR fight)
- Max Schrems https://twitter.com/maxschrems (https://en.wikipedia.org/wiki/Max_Schrems)
These are more or less the usual suspects you'd follow :)