1 thought:
The faster you charge, the less important it becomes to have a precise indicator of your charging % status. A non/flashing slot icon should really do if you can charge your batteries as fast as the C4-12 can do it.
However, if you really insist, maybe this one is for you:
Review of Charger SkyRC MC3000
You and fam can even connect your smartphones to it, so you wouldn't even have to go check the device where it stands, but from anywhere around the house - a serious contender, but costs a pretty penny.
Or if you're looking for a simpler device, I see this one...
Review of Charger Folomov A4
This should meet all your criteria= 8A total, 3A max pers slot, and max 4*2A while letting you choose the output freely + shows status of all cells on the screen. If that's not good enough for you, nothing is.