Ryzen 5 2400G vs Ryzen 5 2600

I'm putting together a small build for my office and I'm stuck between a 2400G with onboard graphics and a 2600 with something like a 1050/1060.

I won't be gaming at all, so I'm not sure if I need a GPU but I will be using this rig for photo editing and heavy multitasking + with a 4K monitor.

Can you guys provide some feedback on this, please?

I'm going with 16GB of RAM and a 970 Evo + 860 Evo combo if that matters.