Considering that the wood style is able to kind of contain the tailed beasts, I'm going to say Hashirama takes this.
none of the bijuus were perfect jins, especially jins who can produce 7 clones, massive chakra arms, biggest bijuudama ever seen so far which countered 5 combined bijuudamas, toad summons which grants naruto toad oil bullet and toad confrontation chant, SM clones which give him sensing
the clones are inside the big fox chakra cloak. to spam kagebunshins, naruto would have to leave Bijuu mode and use kyuubi chakra mode.
no clones are inside the other bijuus, pulling out the stakes
you are twisting the manga i see. madara says "what you left after you died was just some power clinging to me". madara said that hashirama left some power and it is now implanted inside madara.
you are twisting the manga. madara called hashiramas full strength "some power". meaning inferior to his own
maybe because he was getting tossed around by tobi.
but you said kyuubi can energise him.
hashirama is the strongest for now.
hes ONE OF the strongest but VERY FAR AWAY from being strongest