Every tire is a little different.
It might be a little of a guessing game, or digging pretty deep. But I bet some of those tires that are 26.1" by the sidewall numbers will fit under the car (if you are saying a 26" tire will fit). Unless that is even at 26" by the sidewall numbers some fit and some don't. Look at the revs/mi number (tire rack has these), it will give a you a better idea comparatively how tall a tire actually is. Get the # for a tire that you know fits, then look at others you are interested in, even if it says 26.1" by the sidewall #. A tire like the 555 won't stretch as much at speeds a a DR will either.
What is causing the rubbing issues? Can you roll the fenders or have you already done that or don't want to?