I would say whole food as in steak, whole eggs, chicken, fish would all work well!
I was eating 2.2 lbs of top sirloin steak for over a year straight as my only protein source basically eating it 5 times a day roughly 6+ ounces with each meal and only used whey post workout and added a scoop with my meal before bed which ofcourse was 6+ oz steak, complex carbs 100 grams and some fats such as fish oil.
Had to give myself a break so switched to 2.2 lbs of chicken breast for a year straight LOL..........................now I am mainly using whey/casein with most of my meals as I needed to give my body a break from all that meat as I was eating roughly 66 lb/month for a year straight.............yes I am mad but that is just me!
F*** love my steak though!