I am hoping to get some help making my living room seem vaguely coherant as I'm not great at this stuff but like things to look somewhat put together. Our current aesthetic is "we have 4 children under 5 and bought the first one we saw" and I'd like to slowly get away from that charming look 
We currently have a very comfy red sofa. I am inheriting an in-need-of-some-love ercol settee which we can't afford to have new cushions made for yet so we're stuck with the original green cushions for now. We're in a rented victorian era property, so no painting allowed etc. It's a magnolia living room with laminate wood floor. I was thinking a rug may work well to tie them together (magnolia walls, red sofa, dark green settee) but I'm struggling to find one. Can anyone help? I'm assuming a few cushions will also help.
I'm on android so photos won't work but these links are indicative of the sofas:
slf24.co.uk/elize-2-seater-sofa.html?gclid=EAIaIQobChMIgbrZjevd6QIVVp3VCh3FggbkEAkYDSABEgKCc_D_BwE (the red one)
www.theandrewspartnership.co.uk/the-collection/vintage-ercol-windsor-203-two-seater-sofa/