Gandalf the Grey or Gandalf the White? Jesus Pike, I need to know these things!

Gandalf can handle himself in a melle battle but we don't have a good enough indicator of his actual powers to determine his abilities. There's a reason EoFF Character Tournaments circa 2008 had a Gandalf Rule.

For me it's Dumbledore. We know what spells he has and a lot of them are combat-oriented whereas with Gandalf I don't see much of an indicator in the novels or films as to what he is actually capable of.