Is there a graphical sudo (kdesudo, gksudo, su-to-root, ...) tool that works passwordless?

Apparently [gksudo is not obeying /etc/sudoers](https://unix.stackexchange.com/questions/168283/gksudo-not-honoring-configuration-in-etc-sudoers) , neither [does kdesu](https://bugs.kde.org/show_bug.cgi?id=20914) . Therefore asking the other way around... Is there any su-to-root, gksudo, kdesudo, etc. alike tool, that supports starting gui applications as root or different user with an option to skip entering a password?