I would just put a sofa with back to built-ins; I might add a slim sofa table and a lamp or two

If you plan on having a tv in the space, might one fit here?

Thanks! I hadn’t really considered this. The cabinets open forward so that might get wonky but worth trying. Need to figure out cabling to the other wall as well...but good idea!

Sofa along window wall and two chairs with backs to DR.

Sofa and a table/lamp under the windows. Two swivel chairs with a small table on the opposite wall. Bench ottoman across in front of built ins. Acts as extra seating when needed or ottoman/coffee table

For placement of ottoman(s)

For placement of couch and chairs

For chairs vignette

Table lamp