Depends on the aircraft.
On the 747 all autobrake modes except MAX/FULL/RTO will give a programmed deceleration rate. On a dry runway using normal modes, the brakes will work harder without reverse thrust, but landing roll will be the same. In MAX/FULL/RTO mode, braking distance will be reduced a bit with reverse thrust.
I cannot think of a case where at least idle reverse would not be used...