I'm certainly a bad one to ask
. I adore SeaWorld. But here is my two cents, since you asked.
There are several rides that your family would be able to do together, even as non thrill seekers. Turtle Trek, Penguins (the mild side), Wild Arctic (again, the non-motion side), the Sea Carousel and even SkyTower (assuming it has re-opened by the time of your visit) would all be ride options for you.
I am not sure why you are vetoing the shows.....are you fearing that they might not be interesting to your family? They are all spectacularly done, and well worth making the time to see. They're also very nicely varied.....one features the killer whales, one focuses on the dolphins and an assortment of acrobatics, the Pets Ahoy show highlights the amazing talents and abilities of house pets (with all the animals being rescued from the local humane society) and the new Clyde & Seamore sea lion show is outstanding.
There are lots of animal exhibits to check out: you could feed the sting rays, sea lions, dolphins, and sharks. There is a beautiful flamingo exhibit, two great indoor aquariums, pelicans, alligators, and more.
We have also visited Sea Life Aquarium on I-Drive, and IMHO, the experience just doesn't even compare. Yes, the price point is far different but you get a full day park experience at SeaWorld versus a quick 1-2 walking tour at Sea Life.
I think you would be pleasantly surprised at how much Sea World has to offer. I would recommend it in a heartbeat.