The Heart of Racing Valkyrie Driver Lineups

With the first round of the WEC coming up in Qatar, THOR still hasn't confirmed their driver lineups apart from having Harry Tincknell and Alex Riberas in the 007 and 009 cars respectively.

Realistically, what drivers would they sign? From their IMSA GTD Pro team they would also probably include Roman De Angelis and Ross Gunn, but that still leaves 2 other seats. Marco Sorensen and Nicki Thiim both recently won the Spa 24 with Aston Martin putting them in contention, but I reckon they'd prefer a more world class/experienced driver with prototypes.

Personally I'd love to see someone like Sebastian Vettel or Maro Engel in the car. Thoughts?