ato/sigep/sigma chi/ or theta chi

You can't go wrong. Good list, good order. Start contacting them early. They only take about 45 guys each. Spots fill up fast. New rush chairmen won't be in place until 60 days from now, Jan next year. Arrange a visit. Try to have a bid by April or May. Be persistent.

First three are three of the best at Bama, in that order. You'll be fortunate to get a bid from any one of them.

ATO is heavy in-state. Sig Ep has consistent top grades, but you'll need to keep your head on straight as they still party hard. Even more so Sigma Chi.

ATO and Sig Ep only take high GPA guys. That's why their grades are so good. There's still plenty of opportunity for you to screw up.

It is good plan to research and give yourself a place to start in your fraternity pursuits, however don't limit yourself so early in the process just based on a grade report. Give all houses a look before you narrow down to a small group, you may find you fit in better at another house. Absolutely, you are going to college to study and graduate and many houses are very supportive in those endeavors but that is not the only reason you join a fraternity.

Good plan. ATO takes a lot of in-state guys connected thru family, friends, and in-state feeder schools. Better chance for out-of-state guys with Sig Ep and Sigma Chi. Concentrate on your targets. Schedule visits and then follow-up visits if there's interest.
For the top 10 fraternities, rush is pretty much over by the end of May or early summer. Formal rush when school starts is a joke. Lots of disappointed people that didn't know.

ato had like a total of 2 parties last year lol