You have a lot of suggestions - just throwing in Apple Cider Vinegar (you can get in chews that aren't horrible).
https://www.earthclinic.com/cures/apple-cider-vinegar-for-high-blood-pressure.html

From Dr. Morse's detox book:

CIRCULATION AND BLOOD PRESSURE
A cayenne/garlic combo would be an ideal herbal formula to lower blood pressure and increase circulation throughout the body. It would also strengthen the heart and vascular system. Such a cayenne/garlic formula in capsule form would consist of all or most of the following:
Cayenne Pepper Fruit (Capsicum annum) (40,000 HU maximum)
Garlic Bulb (Allium sativum)
Alfalfa Leaf (Medicago sativa)
Butcher’s Broom Root (Iuscus aculeatus)
Licorice Root (Glycyrrhiza glabra)
Hawthorn Berries (Crataegus spp.)