I usually install Fedora from the Everything installer. In the package selection screen, I select a custom operating system on the left and just KDE on the right, no KDE PIM, or KDE applications, or anything else. After the installation is finished, I can install the applications that I actually want (and I have Ansible playbooks to do that, so the whole installation takes like 30min to get in the state I want).
From your list, this leaves out Firefox, KMail, Elisa, and the KDE games (and also LibreOffice, unless you select it in the installer). It still includes KWallet, but, as @barryascott pointed out, this might be too deeply integrated, at least for now.