ETH must be most profitable for you. But best way is to use whattomine service. There you can check yours card in all GPUs algorithm
I stick with ETH as well because AMD seems almost to be built for dagger hashimoto. It's reliable and I never run into any problems with it.
Truthfully, calculating profitability will always end up inconclusive. Cryptocurrency is volatile, you are better off mining a coin that you believe in that has a bright future because the value will constantly change.