What teas with natural caffeine can be used for lemon tea?
This is kind of a "experiment and find out" kind of thing, there being such a large variety of teas in the world.

Earl Grey and lemon is a classic pairing, but a whole lemon might be too much. Jasmine green is smooth and pairs well with lemon, but not lime. Either and any citrus fruit typically pairs well with Yerba Mate.

but the list is huge. I would recommend going to check out your local tea shoppe and seeing what they have.