I'd add to the existing suggestions that the profile page can focus on the genealogy and you can add one to many free space pages for any other history and link them from the profile page
For example, you could have a free space page for property, career, military, etc. Think of them as novellas or chapters about special aspects of a person's life. Also, if any of the information applies to ancestors or descendants, such as property, all their profiles can link to the free space page.
I definitely concur about the summary either way, that is imperative for a long profile. Check out most pages on Wikipedia and that is pretty standard, including the pages for people. Wikipedia also breaks up long pages using multiple pages, just as I'm suggesting. Web pages can be as long as you want, but you'll lose your audience pretty quickly without a summary and headings (which create the table of content).
Another option is to think about self publishing a book or even publishing to PDF and posting it JSTOR or Academia. There are a lot of options these days. While you could fill a profile and free space pages with the contents of a book, that may not be the best presentation option for a full life. If you did this, you could provide a link to the publication from the profile and it would live beyond you, just as the profiles here at WikiTree.