You dont say how obese you are or what your BMI is
Mine was late 40s when I was obese and although I didnt have a diet like yours, mine was a 'healthy' diet, I dont believe it makes any odds to the health of a person if they are covered in fat, inside and out, so I was probably just as unhealthy
My cholesterol was much lower than yours, hovering around 5.6 total but the ratio was high, around 6.2
I have lost a lot of weight, total cholesterol has not gone down but ratio is now about 4.3 from memory, had it emailed me the other day. Im very happy. I do want it under 4.
One of my biggest fears was like you, not dying on the spot, one can deal with that fairly easily! But having a stroke that would leave me immorbile or other disorders and disabilities.
Concentrate on including foods that will support lowering your cholesterol and improving good cholesterol, all the good fats, porridge, good grains, beetroot I believe etc etc