3 was definitely Ozzy, although it is only supposed to have happened once.
From Wikipedia...
On 20 January 1982, Osbourne bit the head off a bat[91] he thought was rubber while performing at the Veterans Memorial Auditorium in Des Moines, Iowa. Rolling Stone magazine in 2004 ranked this incident number two on its list of "Rock's Wildest Myths".[92] While the Rolling Stone article stated the bat was alive, the teen who threw it onto the stage said it was brought to the show dead.[89] According to Osbourne in the booklet to the 2002 edition of Diary of a Madman, the bat was not only alive but managed to bite him, resulting in Osbourne being treated for rabies.