have you checked out Fabric Cafe 3 yard quilts. A lot of her patterns are based around one big piece of a focus fabric. Here is a link to the website. There are free patterns on the website and she has a you tube channel that shows quilts made with 3 fabrics.
I am not affiliated with Fabric Cafe but have used her patterns and like the idea of quick and easy quilts with few pieces per block. LOL
https://www.fabriccafe.com/default.asp