Malinois =SUPERDOG.
I recon the first cross with a greyhound would be better than any other first cross as an all round Lurcher and a Malinois -X- Whippet would not be far behind,and if ya want a dog to actually keep ya alive in a survival situation like was experienced by your G.parents or G.G.parents back in the 30's and beyond (and could well come again) then a Mal -X- Whipp would be the better of the two as it would take up less room and more importantly eat less.