PeaZip appears to rely on 7zip for most of its supported formats. So Peazip isn't really an alternative if you want to avoid 7zip out of security concerns.
> 7z ... should be placed in (peazip)/res/bin/7z, to manage 7Z files and most of the other supported formats
https://peazip.github.io/peazip-sources.html
I personally like libarchive and its bsdtar CLI, which also supports a wide range of formats. I don't know if there's any popular GUI frontend for it though.