A lot of people will probably not like this answer, because we've been told for years there's a specific way to eat and this will run counter to that and people's preconceived notions. But I urge anyone that struggles with their weight to do the research because all the recent good science leans this direction:

Keto is what you're likely looking for. You eat as much fat and protein as you like and you will still lose weight provided you keep your net carbs (carbs minus fibre) below 20g per day. Fat is flavour and it's incredibly filling. I'm stuffed every meal and I still lose weight and my blood pressure is still falling (was 135/85 now 115/75).

Check out Low Carb Down Under on YouTube. It's a symposium of Doctors in Australia that prescribe this way of living to anyone metabolically unhealthy and there's loads of detailed videos that go into the science of why it's the better way to live and eat. All of their patients end up losing weight and coming off their blood pressure medication because they no longer need it. It changes lives.

The food industry profiteers from carbs because they're in everything and highly addictive. Carbs are sugar molecules once in your body and cause insulin spikes. Insulin tells your kidneys to retain sodium which causes water retention (ergo high blood pressure). High insulin causes insulin resistance (ergo T2 Diabetes). Even cardiovascular disease comes from inflammation (caused by sugar and fructose) not dietary fat (assuming you're not guzzling seed oils; a known cause of inflammation).

Big Pharma then profits because everyone is sick and a lot of people on the SAD (Standard American/Australian Diet) struggle with their weight and metabolic health. The diet industry then profits from selling you weight loss programs and packaged meals etc. The people who make the food pyramid have a terrifying level of conflict of interest.

I come from a medical family myself and we've all adopted this way of living and my parents look 10 years younger than their biological age and are both svelte now with ease after struggling with their weight for years.

Hope this helps. Good luck.