I don't think Mark ranks meats anywhere, but I'll give you my opinions. I couldn't really rank them unless I knew what your goals were.
Disclaimer: this is all from my experience. Don't ask for sources cause I got none.
Ruminant meat (beef, lamb) is the best all-around meat. As has been said elsewhere, no other animal does as good a job of vacuuming up a whole field of vegetation and turning it into full-spectrum nutrition for mammals. Liver is the best if you can stand it, but you wouldn't want it every day (you could actually overdose on things like Vitamin A.)
Pork is in my experience the best meat for learning to burn fat instead of carbs. Because of the very high fat content, it's very satiating and comforting and can push sweet cravings to the side. Also, dousing your body in dietary fat will help it learn to burn the fat, and most people who are going low-carb for the first time find that dietary fat is not efficiently stored without the carb-generated insulin spike.
For lean meats, chicken breast, shellfish, and tuna are best. These are of interest to people who are doing a carb refeed for purposes of getting lean.
Among fatty fish, sardines and salmon have excellent nutrient profiles.
Eggs are a solid substitute for organ meats if you can't handle offal. Whites should always be cooked and yolks should be as raw as you can get them. You can't go wrong with eggs.
Goes without saying these are all assumed to be from animals raised in their natural environments. Once you start dealing in CAFO meat or strangely fed animal products, all bets are off.