sudo dnf remove kmahjongg kmines kpatience kolourpaint kmail ktnef neochat sieveeditor kontact
sudo dnf autoremove
Probably not - I wouldn’t expect another package to depend on having Kolourpaint installed, as an example.
Easy to find out though - remove each one and see what other packages depend on them. If none of them matter to you, you won’t cause any harm.
If you are removing kmail you likely will want to remove akonadi packages that are the background services supporting the kmail UI.