Topic: Jango Fett vs. General Greivous.
A battle between Dooku's two greatest henchmen, Jango Fett and General Greivous. And before any of you say "Well, Greivous beat Boba in Boba Fett: A new threat, so he could also beat Jango," consider first these facts.
1. Boba was still young and relatively inexperienced at the time.
2. Boba did not anticipate that Greivous would be there.
3. Boba was badly outnumbered, Greivous had the help of three of his droid bodyguards, which could kill Jedi, and he also had the help of Wat Tambor.
So, all things considered, I think that a battle between Jango and Greivous would be very titanic and destructive, resulting in immense civilian casualties. Remember, Obi-wan beat Greivous, and Jango beat Obi-wan, so I think that Jango would win, but just barely, and badly wounded.