I was thinking the other day, which were the 2 most powerful entities/characters that came into direct combat with each other. I know that the Gandalf/Durin's Bane battle may have been the instance of this in the third age, but what of the other ages? Is the Durin's bane/Gandalf truly the most powerful 1v1 battle to take place in the 3rd age?

I was thinking the other day, which were the 2 most powerful entities/characters that came into direct combat with each other. I know that the Gandalf/Durin's Bane battle may have been the instance of this in the Third Age, but what of the other Ages? Is the Durin's Bane/Gandalf truly the most powerful 1v1 battle to take place in the Third Age?