Well, if you mean pre-packaged tea bags, your choice will be limited by whatever the brand you like is selling.
If your goal is more energy:
From the Black-teas, my best suggestion is Earl-gray.
All green tea brands will be okay.
Red teas - stick with Lipton ones. They are okay.
I don't know if your favorite brands offer St. John's wort, but it is so far, the best brain tonic I know after the black-green-red teas.
If your goal is better health:
Thyme, Chamomile and/or lime - cures cough.
Rose hip - very high on vitamin C.
Valeriana (either from roots or fortified with roots) - Very good to promote long good sleeping.
Lots of others will be beneficial, but I can't suggest good brands accessible world wide - I can talk only about Bulgarian, and most of them are not in tea bags - Just natural crushed dry herbs. (The best kind, actually)