Jasmine is usually a blend with green, and if I'm not mistaken jasmine flowers are yellow, so it would probably have a soft green and yellow theme. And it doesn't look like anyone has ordered it yet.
As for things that haven't been ordered yet, I haven't gotten a lot of berry teas, and there are tons of other herbal varieties out there. But if you want some specifics, here are some tea brands that I like that who might be able to offer some inspiration.
Rishi TeaZhena's Gypsy TeaNumi TeaTwiningsBigelowWhen ordering a blend just be sure to ask either by ingredients in the blend, or if you want to use the name of one I'd appreciate a link to it to be sure I'm getting the right one. And there is no rule against duplicates. Every person will get a unique interpretation of the tea even if it has been ordered multiple times.
I still need to make myself rose tea, yerba mate, and lavender chamomile if I want to finish my collection of my personal favorite teas. I finished tulsi but I haven't posted her yet, and I'm still considering whether or not I love chrysanthemum pu-erh enough to make one of that or not.
(Edit)
Whoops, didn't notice you'd asked about coffee as well. I haven't gotten orders for pretty much any flavored coffee yet, but if you don't want to have the same one as someone else you might want to avoid hazelnut.

It's the only coffee I drink.