No he didn't. Neither the other guys you mentioned.
Via a Tumblr blog about vocalists:
Countertenor
Michael’s voice is unmistakably light and even androgynous. This is most likely why people would call Michael a countertenor. His tessitura is high, but not way up there with a countertenor’s voice. He is simply a non-lazy tenor, who explores his range. Most tenors who actually use their range are labelled countertenors (eg. Bruno Mars, Mitch Grassi), just like Michael.
A Lyric Tenor was/is a tenor used to sing pieces that are very wordy and need a vocalist with agility and brightness to their tone so the Lyrics can be delivered to the listeners with clarity. A good Countertenor can sing Lyric Tenor parts and a good Lyric Tenor can enter into Countertenor territory
but there is a difference
.
Freddie Mercury is a Lyric Tenor
Paul McCartney is also a Lyric Tenor
Michael is a countertenor because his voice naturally rests in his upper chest lol. Michael sang and talked from his clavicles with so much ease that his voice sounded androgynous like the tumblr post said. That is a full blown countertenor not a Lyric Tenor.
Now listen to Paul and Michael on Say Say Say. You can hear the difference between a pop Lyric Tenor and a pop Countertenor