Would be nice to have one modren chair something like the barcelona.
If sofa is fabric, might also be nice to have one leather piece, again to add organic element.
No modern furniture collection is complete without a Barcelona chair. It was designed by Mies van de Rohe for the 1929 Exposition in Barcelona (hence the name), and it's curved X-shaped legs and perfectly tailored tufting are often imitated but never matched. — Becky Harris