the entity using the satoshi pseudonym is one person. that is established.

however satoshis idea's are a patchwork of many older concepts that alone would not work but satoshi was the brainchild of patching it all together into something that works. plus adding his own customisations and extra tweaks to it. which made it special and unique

also satoshi, worked with other people. that is established. but only the single entity used the satoshi pseudonym. all the rest helping out used their own pseudonyms.