It's no more about which graphic card you will use, it's now about how much you will get them, are graphic cards cheap enough in your country? If yes then go with those that have higher hashrate less power consumption for example
1660 supers.
3070
A2000
RX6600XT
Fallowing that everything on amd side is good choice, exception of the 6900xt
6600 6700 6800 will bring you 0.6w/h rate