[MLD-Grounds-Keeper-Willie]

There are some good guesses, however, I think that maybe an orc would actually be pretty powerful. Maybe Ugluk or Shagrat. The reason I think so is because there were so many orcs, and most, if not all, were ruled by Sauron. If a great orc warrior were to obtain the ring so powerful, then he would become much more powerful himself. But, mainly I think that it would be sort of pride. A war he waged would be an orc war, not Sauron's war. Most likely every orc would be fighting together with pride for teh gains of their race. Do you see what I'm getting at? I'll explain further if anyone wants me to.

But, there are others that would be more powerful than an orc. Just to name a few (and in no particular order): Gandalf, Morgoth, the Balrog....