https://pcpartpicker.com/list/zhct4Cchanged cpu to pentium G4650 (really great budget cpu, only a little over 60 dollars and it works well with something like your rx 480)
changed motherboard to one with an h270 chipset (good $100 mobo for kaby lake cpus)
downgraded memory to 8gb (8gb should be fine for you, dont see why you need 16gb)
added an ssd (gives a massive performance boost)
changed psu to an evga supernova 650 (a bit on the expensive side, but its gold certified, is modular so you dont have a bunch of useless cables sitting in your case, and gives you quite some headroom if you ever upgrade your pc. also i use a supernova 650 in my own pc and it gets the job done)
added a copy of windows from kinguin, with price of the buyer protection added in (you'll need an os of course, and kinguin sells them for cheap, the buyer protection protects you in case the windows key you get becomes a bad key)