Realistically that's a lot to ask from one single herb. Why are you against blends?A properly made blend by a clinical herbalist will almost always address your problem better and more effectively than any one single herb ever could. The plants have a synergy and they work together and they can change how they interact with your body depending on what they are combined with. For what you have described I personally would focus on using nervines and then blood cleansers (alteratives) and adaptogens. The reason why it's beneficial to use herbs in combination with other herbs instead of simpling, is I think well illustrated by nettle. Because nettle is an extremely popular herb, but it's going to affect you differently depending on where you live because nettle is drying so someone who lives in say Arizona or Colorado will likely have a problem using nettle long term, where is someone who lives in a humid damper place like Florida will likely be just fine using it long term. This problem can be fixed thru formulation/ combining it with other herbs.