This one is also pretty big on my list.
More or less opened Hubba Hideout to advanced tricks, and fused East and West Coast with one trick. Freddy's switch 5-0 on the cover is an acceptable variant.
Cardiel's padless 540 is a big one too. And the broken board 360 at Marseille. Throw in the SF rail and that ramp grind after being fucking paralyzed and I think Cardiel has won for most iconic tricks on all terrain.
Probably won't be as popular here but Jamie Thomas's smith that was the board graphic forever was pretty iconic for its time.