If you dont mind the bulk, you can look for edifier range. Sound will be fuller and more musical than the weak soundbar.
You can add a sub later on.
Shop Edifier R1850DB Active Bookshelf Studio Speakers with Bluetooth - Matt Black. Free delivery and returns on eligible orders.
www.amazon.co.uk
Or you can get one with the sub, but with weaker/smaller speakers
Free delivery and returns on eligible orders. Buy Edifier S350DB Bookshelf Speaker and Subwoofer 2.1 Speaker System Bluetooth v4.1 aptX Wireless Sound, Optical Input at Amazon UK.
www.amazon.co.uk
Then again, i realised next gen consoles do not have optical out! Im not sure if you can use usb audio out in place.
Otherwise, you have to prefer hdmi inputs. Or you could do some wiring, hdmi to your tv, your tv speaker out(if it have the ability) to your audio speakers.