Any combination of Sordo, Mikkelsen, Lappi and Rossel looks most likely to me. Out of these only Mikkelsen and Lappi are candidates for full season drives.

Gryazin a riskier option (for multiple reasons) and unlikely as only driver.

Paddon a bit distant bet and again not as only driver due to 7 years out of top class car.

For car sharing I would expect max two drivers.