Quote:"Working with the super talented director John Smith is always a lot of fun!"
You must use the definite article ('the') in this sentence. You are discusing a definite, named, unique person. There is only one "talented director John Smith". Using the indefinite article ('a') is not an option.
Quote:"Working with a super talented director like John Smith is always a lot of fun!"
You must use the indefinite article ('a') in this sentence. You are discussing an indefinite concept (a talented director like John Smith).