Of course, "art and the process of creation" would most likely be handled for a plural noun phrase that can take a plural verb ("present"). The final results are crystal clear: there are 108 hits for "most of whom have" and none for anything. Google NGrams offers comparable results. https://financefeeds.com/drivewealth-fined-100000-by-finra-for-failures-caused-by-third-party/