I wrote about Mac clipboard managers[1] a while ago. My answer then: Copied. Since it seems to be dead, my answer now: bite the bullet and pay for Paste.
You bet! I don't remember why it wasn't on my radar at the time. Maybe I just didn't find it in my searches? I might have seen it, didn't perceive much active development (eg to support newer OSes), and moved on to the next option, but I don't specifically remember that.
Regardless, I'd review it if I were writing that post today. Note, though, that the mobile app is $9/yr. Cross-device sync was one of my personal requirements, so Copy 'Em would only be $1/yr cheaper than Paste.
[1] https://honeypot.net/post/favorite-apps-copied/