I don't know, for me Meckes is neutral. The ones with more negative connotations are probably 'Zum Goldenen Adler' (due to the sarcastic undertone) und 'Amerikanische Delikatessen' (due to the perceived oxymoron)
Interesting, I don't know any of your synonyms from my personal experience. The especially negatively connotated variant I know is 'McDoof' (basically 'McDumb' when translated to English).
