(Okay time for me to make an actual post for once that isn't a WDYLM poll or about a new taxon)
For me, these are the top 10:
10. Ankylosaurus:
(Art by Gabriel N. U.)
This was a touch choice in my opinion, choosing between Ankylosaurus, Carnotaurus, and Parasaurolophus. The (not really) living tank ends up making the top 10.
9. Brachiosaurus:
An iconic sauropod, known for its scene in the og Jurassic Park. Idrk what else to put here for Brachiosaurus. It's definitely more well-known than Ankylosaurus, but not so much with the next one on the list.
8. Giganotosaurus:
A massive carnivore, Giganotosaurus got most of its popularity before 2021 from rivalling T-rex in size. Ever since the release of Jurassic World: Dominion, Giganotosaurus has continued to rapidly rise in popularity. Most people just call it "Gigantosaurus" though, but I'm obviously not putting a random dubious sauropod on this list.
7. Stegosaurus:
(Art by Julio Lacerda)
Dunno what to say here other than that Stegosaurus is iconic herbivore that's known for its dorsal plates and thagomizers. Could be interchangeable with Giganotosaurus in terms of fame. Definitely more recognizable/distinguishable than the latter though.
6. Spinosaurus:
(Art by Andrew McAfee)
Although formerly infamous for its role in the 2001 film, Jurassic Park 3, and its rivalry with T-rex in 2000s to early 2010s internet debates, Spinosaurus has had a resurgence in popularity among non-dinofans in the 2020s. Mainly helped by the constant scientific debates and new research papers published on the animal's anatomy and possible lifestyle, as well as internet memes (maybe Camp Cretaceous too), the popularity of Spinosaurus is still rapidly growing, and will most likely surpass the next one on the list (within the next few years or so).
5. Allosaurus:
Pretty much the default Jurassic carnivore. 100% of paleo enthusiasts know what Allosaurus is, but it just barely fails to make the top 4, since it still has a long way to go before reaching the recognizability the next 4 have for the general public. It's been frequently mentioned and featured in popular media in the past, but its popularity there has died down a little lately. Also known as the "lion of the Jurassic."
4. Triceratops:
Now we're actually getting into the dinosaurs that a good majority of the general public knows about. Known for its 3 horns, Triceratops was pretty much the only dinosaur from Hell Creek known to be definitively capable of killing a healthy adult T-rex. You could point to a picture a Triceratops and nowadays most people could tell you what the genus is, although it's kinda surprising since it's gotten next to zero significant roles in any of the Jurassic Park movies/TV shows.
3. Velociraptor:
(Art by Fred Wierum)
The most iconic non-avian theropod (aside from T-rex) that almost everyone knows about. I put Velociraptor lower than the next two mostly because people just call it "raptor" (which is more of an umbrella term for dromaeosaurs) than its actual genus name. Still, it's an iconic animal to both paleo and non-paleo enthusiasts. Also the Toronto Raptors are named after them (obviously).
2. Brontosaurus:
(Art by Mark Witton)
Pretty much the sauropod. The average joe usually calls every long-necked dinosaur a "Brontosaurus." T-rex and Brontosaurus are the two dinosaur names that everybody knows by default. Those two are leagues above every other dino genus when it comes to fame.
1. Tyrannosaurus:
No explanation needed.
Credits for the skeletal mount photos:
Also happy Halloween!