In my opinion one of the full design themes should be picked because some of those single designs look very nice individually but would clash with others.
My pick would be Emiliano’s theme, it looks the most like an evolution of the opensuse style. Imo the others are either a bit too minimalist or deviate too strongly from the original design.
Nikolayan’s design is also good, but I prefer Emiliano’s because that you can recognise the chameleon better in every logo.