That trunk could make a great coffee table. Or if u have the space, an end table, bit you might need to add some books to it to give it some height
There are many sofa tables to choose from that are higher and narrower to choose from that would look less chunky....

here's some sofa table options

Tommy Bahama

The trunk is out of proportion with the couch, but gosh! I love it and soooo hope it will work in another spot in your room, with that same vase and tray.