I’ve had only a short history dealing with matters WW1. Are you sure that there are no more markings on the rim of those WW1 medals. My take on 1 and 2 would be 87036 Pte D OAKMAN (private) MIDDLESEX REGIMENT.
Maybe one of the forum members can direct you to the Archives and get hold of a copy of his Medal Index Card (MIC).
Hope that helps a little.

Mike