Like I said, that's great that you found your answer. Now for some shameless boasting...for the past 15 years I've hovered around 170lbs (over 6' tall), low cholesterol, BP ~110/70, HR in the mid 50's and I have a six pack. I generally eat whatever I want (probably 3000-4000 cal/day) but fortunately I never want fast food or doughnuts. That's probably the key along with an active lifestyle where fun for me is an extreme workout for most. The point is there is no one answer but the extremes (i.e. 100% meat) are almost always not good since few people can tolerate them...or more importantly stick to it (eliminate carbs forever? good luck making it 6 months). More importantly, our planet just can't sustain 8 billion human carnivores. And yes I realize that most people wouldn't stick to my lifestyle either.
But good news! Most of the newest research I've read or heard about focuses on gut bacteria. Its all about cultivating a healthy ecosystem in the bowels and most of the research focuses on feeding it fiber. If you can handle all meat the rest of your life then great! If not, maybe reexamine your definition of a "western diet" and replace all the added sugar with broccoli. Good luck!