Michelin Road 6, Conti Road or Trail Attack 3/4, all great road tyres.
All tyres will square off though, if doing straight road miles or not hitting twisty roads. That is motorcycle tyres for you with their round profile! The part that makes contact wears.
The two brands mentioned above are imo better at keeping their shape than most. Again though, they will still flat off if not getting wear across the tread width.
Deep tread patterns? They will last longer, because there is deeper tread! It will not solve the tyre getting a flat profile though.
On my 4th GS, never had tyres last beyond 4-5k max. I never change just a rear, as when the rear is worn out, the profile will be gone on the front too, even if it looks “okay”, it will have lost shape.
^^^13k !! Maybe could make a front last 6-7k but on the wear bars and highly suspect.
This is the thing, people ride their bikes in different ways, with different priorities. Just like seats and screens, there are going to be different results and expectations.