As someone that lives in a country that gets the odd drop or two of rain... ;)
Michelin XPCs get my vote too.
TBH - most good quality tyre compounds will work in the wet. It's more about the compound and size than the tread pattern (though obviously the extreme stuff will make a difference).
The narrower tyres work better as they will cut through the water better where as you're more likely to aqua-plane with wide tyres. (similar principles to the pumping the tyre up comments as you're reducing the surface area.)
I find that even my XZLs aren't too bad in the wet. They're an aggressive mud tyre but they're narrow and a Michelin compound.
HTH
M

