Consider softening hard-line modern with a few unexpected antiques. The blend, a mix of periods and materials, will draw more visual interest than religious devotion to a single unified look.
Anchor your seating with a MCM sofa with multi-position adjustable arms (needs recovering to make it a versatile star)
Add a cool and edgy Cantoni chrome and glass coffee table
Mix up your sense of scale with a kiddie-sized Knoll Bertoia chair (provenance undocumented)
Then perhaps blend in some texture with this rustic wooden table