Not much more to add, several others pointed things out as far as Lux Ult. And previously you may have seen the ability not hit because of hitbox hijinks, but if Yasuo had ever actually been able to block the Ult, the laser would have actually stopped at the wall which wouldn't happen.
Some further clarification on Yasuo wall (which also applies to Braum's wall)
They block Projectiles, which in League code terms is basically: Any particle (an object of some kind) that has a travel distance - meaning it moves from Point A to Point B, with a few special cases.
Most ranged Auto Attacks have projectiles - Ashe shoots an arrow (particle) that travels (from her bow to your face). Exceptions: Thresh's AA is classified as Ranged (which also means he does not proc Relic Shield), but Thresh's attack does not have a particle. Instead he has a visual animation where he whips his hook at the target, and then they take damage. There is no "object" in coding terms that travels from him to the target so there is nothing to destroy. Kayle, when she is using her ranged AAs, also does not have a projectile. She swings and the target burns, but there is no projectile.
For other Champs, AoE abilities that just sort of "appear" in the zone without actually travelling anywhere will not be blocked. This is why Lux's Ult is not blocked, but all of her basic abilities are. When she ults the laser appears in the zone but doesn't move. same for Vel'Koz ult. Some look like they move, but don't. Annie's incinerate, for example, visually looks like its moving but the zone of the AoE doesn't move and there is no projectile. As soon as the ability casts the entire zone is affected. No projectile.
Then you have projectiles that go "above" the wall, such as Ziggs and Kog'Maw's ults. And Riot made a special case for Nautilus' Ult by saying it goes "under" the wall even though in game terms it is a projectile (particle moving distance).
This doesn't even address things like Units. Champions are obviously not blocked, which is why you can't stop a Tristana from jumping through the Wall. but there are Units & Pets that Champions have that may interact with the wall. For example Orianna's ball is not deleted, but it will stop upon contacting the wall while moving. Fizz' Ult fish drops to the ground and can still be walked on by an enemy. Azir's soldiers will stop moving.
There are a ton of other little niche cases but hopefully that gives you a decent sense of what will or won't be blocked!