You can look for an artist on Pinterest, OpenGameArt.org etc. or you can buy art assets on Unity Store. Each game has different art style so be careful when choosing your artist on the genre you are working on. 

Sorry, I misread it but what exactly is the project about? Do you already have a project or is this an "I want to fund my own company" kind of "hobby" project?

Taking a look at your survey it seems like you are interested on people recruiting (for your own stuff I guess?) rather than collaborate on …