The phrase 'aggressive of' is not correct in written English.
You could say 'aggressive toward', which would be appropriate in a sentence such as: "He was aggressive toward his opponents in the debate."
"It's the most aggressive of any minivan," Mr. Garner said.
"I have no problem with pushing myself, but I am not that aggressive of a person".
Mr. Kozlowski was the most aggressive of all, Mr. Sonnenfeld said.
"We were the least aggressive of all the big firms in the first half of 2007.
Considered less aggressive of the two, she came from a slightly more stable background.
The nimblest and most aggressive of the small insurers will gobble up slower and smaller rivals.
Looking back, it seems quite aggressive of her to have left at dawn the next day.
With Takeshi Kitano and, as the most aggressive of the teenagers, Chiaki Kuriyama.
A biopsy confirmed glioblastoma, the most aggressive of malignant brain tumors.
Viacom has been the most aggressive of all the channel owners in the app battle.
Fortunately, weddings usually provide enough drama to compete with the most aggressive of performers.
