You don't even need to do keto or wacky "just meat" diets to handle insulin. Protein consumption prevents insulin spikes for around 1-2 hours after eating. Also, proteins and fats slow down digestion.
Turns out, the good old Mediterranean diet is spot-on for a healthy lifestyle.
But yes, meat and vegetables is basically what I'd recommend. Never pasta or bread or sugar unless you need help gaining weight.
How about: some pasta and bread to enable physical exertion.
My father and I have avoided carbs for a few years now. Can do home renovations, gardening, dirt bike riding, and hikes better than we ever did eating carbs. Unless you're doing long distance hikes/running/hard core sports, I really don't think that's true.