So as a fan of Animal Kingdom, I'll rank the rides from best to worst as has another poster. I believe I have credibility (even though it is 100% subjective lol)
1. Kilimanjaro Safaris - It's the most immersive Disney attraction hands down, it's like a true African safari with real biotypes and accurate fauna to those biomes. Wildlife at the forefront makes the attraction different everytime, it has a message and a great feel of adventure into the wilderness with all kinds of beasts. The entire time and it actually is a part of the Harambe lore itself.
2. Expedition Everest/Flight of Passage - a tie, both are great. Theming is totally on point, themed into immersive lands and with great ride experiences. EE needs to fix it's Yeti but with it, the Yeti is pretty real. FOP is perfect and is the best example of how to effectively create a screen based experience. Fills the mythical creatute void left by Beastly Kingdom.
3. DINOSAUR - underrated. Great ride makes it feel rough as if you are truly traveraing the primeval jungle. Animatronics feel real and are genuinely scary. Some good thrills and an immersive environment.
4. Kali River Rapids - thrilling, very wet, and like nearly everything at DAK, it effectively transports you to a new place. It has a nice message, but it's a bit short and could use a more engaging story other than the forest is being destroyed, so run. Maybe show us animals losing their homes to drive the point home.
Na'vi River Journey - not too bad. Way too short and lacks a true story, but it's a beautifully themed attraction than has a very lifelike AA at the end - though this AA should be in animal in an animal park.
5. Primeval Whirl/Triceratops Spin - another tie. I tried to choose one but no, both are equally heinous and should be destroyed, with the rest of Dinoland USA, ans turned into either a land set in the past or one that is themed to the badland - the red deserts out west, a paleontological site out there. Could be done well with great rockwork and we can keep Dinosaur.