We have a lot of airfields in Greenland, and in Iceland as well, where IFR procedures are established at uncontrolled airfields.
In Greenland they all have aerodrome flight information service, AFIS, established with associated traffic information zones, TIZ, classified as G where contact with the unit is mandatory. Outside below CTA, FL195, flight information service is provided by a designated unit and two way communication is mandatory for IFR flights.
This is outside EU though, but I do not believe that there is a EASA requirement for ATC to be established for IFR procedures. Only the ones you've already found.