I feel that he is one of the most perfect jojos, he is the most human jojo , he looks like a teenager and not a bodybuilder and behaves like a teenager in the 90s
It makes sense josuke would be the most well adjusted since he had parental figures who cared and were consistently there for him compared to jotaro, giorno, and Jolyne(yes I know jotaro and Jolyne had their moms, but they both had a father who they knew existed but was never around which led to them growing up punks).
Jonathan: Tanjiro type of MC(Kind & pure MC) Joseph: Gintoki type of MC(Funny troll MC) Jotaro: Ichigo type of MC(Brooding & serious MC) Josuke: Luffy type of MC(Cheerful & friendly MC)