Madara & Sasuke
For many reasons
1 - they have a great personality and they're not Konoha tools ( like itachi who is danzo's pet )
2 - they have a Big Pride and a logical reason why they have their own path
( itachi live his whole life as a tool , Obito is a crybaby who is butthurt because a freaking girl )
3 - they Have the Best Form of Susano and they have their own skills ( Sasuke - Childori - Kirin - etc )
4 - they are the leader type of Guys ( itachi was konoha elders tool )
5 - Cool Haircut
6 - Cool customs
7 - and most improtant they Care alot for the Uchiha clan
( unlike itachi who killed his own parents and clan , Obito care only about rin lol )
finally not to mention without madara help obito will be dead as a Fodder ..
Sasuke & Madara FTW