Naruto Character relatives in other series
This is a list of who I think characters from Naruto would be in other series :
Naruto / Gohan
You may find it crazy I don't compare Naruto with Goku / Kakarotto, but frankly Naruto's personality is a lot more like Gohan's (tries to reason with people, doesn't like wars, always cheats his battles with hidden powers when he gets angry :p, gets all the good trainers, and has just as much courage)
Madara / Vegeta
A lot of people think Vegeta would be Sasuke, but how the hell do the two even compare? Madara is like Vegeta, he is arrogant, prideful, supposed to be the strongest of his clan and doesn't give a damn if the clan got destroyed.
Orochimaru / Voldemort
Not comparing him to another DBZ or even manga character, but it's the most obvious. He's selfish, likes snakes, is afraid of death, needs vessels to survive, and divides his consciousness into curse marks so he can always resurect when he "dies". However, he seems to still have a part of good, which Voldemort doesn't have at all.
Obito / Anakin Skywalker
Continuing with comparisons outside manga, people have been saying Obito is a sort of Anakin as a joke but frankly he really is that way. Never was considered elite by his clan, ended up feeling insecure, and learns about his love's death after he apparently dies, leading to the end of his former personality.
Jiraya / Muten Roshi
One is the turtle hermit, the other is the frog hermit. Both are perverted sages who train the main character, very obvious comparison in my opinion.
Kabuto / Basic Cell
Kabuto reminds me a lot of Cell as he is when he first appears in Dragonball Z. He is "shy", hiding away only until he's sure to beat his enemies. He lives of other people's abilities, not his own. I'm not comparing him to Pefect Cell, because Perfect Cell has a whole different, much more arrogant and prideful personality.
Minato / Sonic the Hedgehog
Both are ridiculously fast and rely purely on speed and some wit to beat their enemy.
Will make some more later. Leave some ideas.