in my opinion nobody is better than edo itachi.

but u could also try for pain ningendo as he is a somewhat good ninja.

Kakashi would definitely be the lower tier of the 3.
SB Kurenai is more defensive with her shield and her chaos is only though her KD > Repulse chase with somewhat unreliable chakra gain. still very good unit

SB Ningendo is more offensive since his mystery is the whole chaos + chakra sap, plus his chase is similar to 5k madara with repulse > KD and 20 chakra drain. His mystery does no damage though.

Both are very good units, but yeah pales in comparison to edo itachi in the end, but if i had to rank it, sb kakashi < sb kurenai < sb ningendo < edo itachi.
kurenai if you're slower, ningendo if your faster