Humans disappear.

[Creeping Death]

What species dominates or benefits from this most?

Doge? Corvids? My genitals?

Some species would find beneficial use for all the stuff we leave behind. The species Doge is in a good position to take over all of our shit, but what use it would be put to, Idk.

 

[Black Rose]

The cheese stands alone.

 

[Cognisant]

Pigeons, rats, roaches and other urban pests will survive but their numbers will be greatly diminished. Cats and dogs will go feral, again they'll survive but their numbers will be greatly diminished.

In the absence of humans some species of ape will eventually fill our ecological niche and tens if not hundreds of thousands of years later their archeologists will excavate military bunkers in which they'll find few if any intact relics.

Nuclear waste will be our greatest legacy.