gandalf as a maia

[the phantom]

If some elves were powerful enough to slay Balrogs, than I'd say they could give Saruman a run for his money. And seeing that Galadriel is more powerful than Glorfindel who slew a balrog...

Being wise and powerful is not the same thing as being very physically strong, very quick and agile, and extremely skillful with a weapon and experienced in hand to hand combat. Glorfindel is a warrior and I would expect him to have much more success in a physical battle than Galadriel.

She (with some help from Saruman) threw Sauron's butt out of Dol Guldur.

With her bare hands?

She is also able to sustain Lorien with the power from her ring

...which has nothing to do with how well she can swing a sword.

And being a Noldor elf who has seen the two trees

Viewing trees does not count as battle experience.

I would say she is quite a warrior if needed to be one.

I imagine she would do decent if she had to, but compete with Glorfindel or other such warriors? No.