I'll go with
Martinez
Cash, Southgate, McGrath, Staunton
McGinn, Townsend, Barry, Grealish
Yorke, Watkins
Kamara probably close to edging out Townsend at this stage but I really rated him for club and country. He was a rock in midfield. Barry is underrated by Villa fans I think, very good player in good, bad and downright ugly Villa teams. That midfield pair wouldn't lose many battles. Selection of Cash and Watkins might set a few off here but I admire their resilience. Grealish had the X factor when we needed it most. Bravest player I've seen in a Villa shirt too.
They were definitely wholehearted defenders but don't think Mellberg or Lauren had anywhere near the class of the two centre backs above. Can't believe I've left out Young and Benteke as others have said carried an incredibly poor team.