Currently, the only available CS+ port other than Pyramid that completely works with the latest publicly available version of Plus Porter is
AGTP Story, a mod that is basically Cave Story except with the AGTP translation.
The next release of Plus Porter will feature another one or two more ports. All the new features for the next version are pretty stable now, but this release has been delayed due to discovering a problem with the way Cave Story+ reads mods. I've been spending the past week looking into trying to hack the EXE to fix this. Progress is slow, but at least I'm closer now than I was a week ago to figuring out what I need to change.
Hopefully it won't be too much longer before the next release, thank you for your patience.