My favorites:

https://www.adagio.com/black/earl_grey_moonlight.html

(This one is similar to the above, I like it slightly more, but it's only available to buy on blue moons):

https://www.adagio.com/black/earl_grey_bella_luna.html

Gunpowder green tea is excellent if you're into typical earthy green teas. I buy this one in bulk bags:

https://www.adagio.com/green/gunpowder.html

Silver Needle is a perfect white tea:

https://www.adagio.com/white/silver_needle.html