I went with AC/DC just because they are may faveourit in this list.
Their riffs are probably the best ever written and the feeling they give you when you listen to their albums or when you see their shows(specially the 2nd one)is just unbelivable. ANd about ANGUS YOUNG ...he is probably HARD ROCK's best and biggest symbol. He is not the best guitarist but I couldn't imagine a rockworld without him.
You can feel a strong AC/DC influene on JERSEY and on KEEP THE FAITH which are 2 of Jovi's best albums.

However, I don't think they are the most influential band or so but they created a way to rock 'n' roll that a lot of bands wanted to copy but noone managed. BACK IN BLACK and HIGHWAY TO HELL are milestones and even if they aren't as good songwriters as the others in the list their coolness is unbeatable!