Per the office of the US Department of State - Office of the Historian:
"What country was the first to recognize the United States?
France recognized the United States as an independent state on February 6, 1778."
Source: https://history.state.gov/about/faq/first-to-recognize-US
Why do you claim that the more commonly accepted first is Morocco? I, for one, have never heard that. Give a source for that part of the argument, and maybe we can figure it out.