Since you have a rug with such a ''strong" geometric pattern, I would suggest you prefer abstract art. Of course, your taste seems to be traditional (lamp, side table), but I do believe that abstract art in wood tones would look good both with the rug and the sofa and with everything else in the room. I mean something like that:

It's really hard to imagine how are will look in your space before you actually get it home. I might suggest trying our website www.drizl.co where you can virtually try out the artwork to understand what you like and what will go with your space.