I'm trying to find out who created or first used the codon wheel chart as far as we can know? (I don't mean the tabular format)
It is very difficult to answer this one for certain but I think the codon wheel representation is sometimes attributed to Rosemarie Swanson who represented the amino acid code using Gray code (or reflected binary code).
Swanson's work actually went quite a bit deeper than the simplified codon wheels you find in ordinary textbooks (ordering by size of the amino acid and position within the chain as well). You can have a look for yourself here in her 1984 article A unifying concept for the amino acid code in Bulletin of Mathematical Biology.
DISCLAIMER: I do not claim that I know the answer to this question for certain nor can I. However, I cannot find official publications earlier than Swanson's 1984 paper showing a circular representation of the amino acid code.