Have you also looked at:
1. https://schema.datacite.org
2. DOI Kernel Schema
3. ORCID seems to use CreativeWork from schema.org (we fetch orcid records in JSON but I'd have to double check what schema that's giving us) https://iphylo.blogspot.com/2020/01/orcid-serves-schemaorg-linked-data-via.html