A fireplace is designed to be the focal point of a room.
A well planned seating arrangement could complement the design and add the coziness factor to the area.
You could arrange the seating the following three ways.
Formal: Identical pairs of sofas placed on either side of the fireplace along with a couple of single seaters and a coffee table completes the formal look
Semiformal: Arrange sofas in a perpendicular fashion opposite fireplace and weave in day bench to give it a semi-formal look.
Casual: Oversized chairs, ottomans, benches, daybeds with colorful cushions add casual touch to the décor.