I like the idea of eating a rainbow every day. All vegetables have nutrient quality to them. Some are better than others for various reasons.
I eat a different color vegetable at each meal to round out my nutrient list.
Essentially, two vegetables per meal each a different color.
I do green at almost every meal.
It's worked well for me.
I do avoid 3 vege's that I call the PCP of vegetables. Mostly because they are carbohydrate dense, but that's personal preference.