That's subjective, hard to say.
Kracken has test seats as you walk up to the ride you can try.
Row 6 is usually reserved for big people, as the restraint is slightly larger with 2 belt clips.
As for JTA, I'm not sure. It's a bar that comes down.
The only other ride is the Polar Bear exhibit simulator, and I wouldn't go on that because it may make you sick. Do the walk thru instead.
The rest is shows and feeding areas. Arrive to each show 30 minutes early for the best seats and you'll have a great time.