Marty Kendall – wife is Type 1 diabetic, he is a super smart guy and does tons of research. Here’s his cheat sheets:
https://www.facebook.com/marty.kendall.94
https://nutrientoptimiser.com/
The most nutrient dense foods: https://optimisingnutrition.files.wordpress.com/2017/07/the-most-nutrient-dense-foods.pdf