Good call… more light disco than funk. The laid back groove was famously inspired by George McRae Rock Your Baby.
I’m a huge fan of ABBA and if you’re going to go there, I would suggest a very early deep cut from ABBA, My Mamma Said.
It’s a wonderful combination of laid-back R&B groove processed through an icy Scandinavian reserve and coolness.
For me, it has endless replay value (great little guitar solo two), and I think it still sounds amazingly contemporary. I could see an Indie R&B artist putting this out today. Check out the funky bass playing, and the funky guitar solo (somebody edited a weird ABBA video to it):
Also going to throw in this from ABBA. This is from there more disco-oriented Voulez-Vous. But it does have one of the more slinky R&B grooves.
And Agnetha Faltskog is always easy on the eyes

(my 70s singer crush)