If Tanjiro was the god of hell (au and powers in description) 

Tanjiro/Akuma Ashura: the god of hell and is very powerful he has basically every power. He is the only one able to access his room unless he brings someone there.
Upperdeath1 Tomioka Giyuu: also very powerful and is holding back a lot, Has Elemental powers.
Upperdeath2 Yin/Yin Yang: has the powers of dark and light.
Upperdeath3 Darkened: the power of darkness and has special tears that control demons whenever ahe cries.
Upperdeath4 RainbowDeath: has clones that correspond with the colours and emotions I forgot the name of the demon this is based on… sorry. 😞
Upperdeath5 Bloom: controls night and day also can stab demons with her tongue/teeth.
Upperdeath6 Golden: kinda like Nakime? Except her violin can do other things like kill demons (she also acts like a child and has a flower in her mouth at all times except when she swallows it but regrows back in a short period of time)