I am just curious and would like to try out a few things just for the fun of it.
I was in your position a few weeks ago, crypto-words - I got a Moonlander 2 and it's great if you, like me, want to dip a toe in the contemporary world of ASIC litecoin/altcoin mining. Unfortunately the fan died on mine and I'm still deciding on whether to replace said fan or get a couple more Moonlanders, remove all the USB fans, and cool them externally.
There is no USB miner that meets your conditions.
The FutureBit Moonlander 2 is the closest, but the profit isn't "high" in nominal terms. However, it is high in that it not zero like every other USB miner.
wavelengthsf is right, from the research I've done and from reading this forum the Moonlander 2 is the best for your buck; however I learned pretty quickly that unless you have a very specific goal or coin in mind you're not really going to make any notable profit. There are bigger, better rigs to mine with, both ASIC and GPU, and you can find plenty on those here as well.
so I want to get a total of 6 more sticks .