Recently I had a conversation with a friend, who told me about how he thought he would be the fastest of his university to get his bachelor's degree. I answered that I find this pretty presumptuous and would never assume of myself to be the best in anything out of such a large group of candidates.
To that he countered, that he didn't say "der Beste" but rather "der Schnellste".
I knew what he said, but couldn't think of a single adjective that describes being a superlative in anything (positive or negative).
I would like to say:
"Ich würde nicht annehmen, dass ich in irgendetwas [gesuchtes Adjektiv] bin."