In WWE and going with the World Heavyweight Title I'd say easily Chris Benoit, fans longed for his main event spot, he continued to put on stellar matches with Angle, Lesnar, Cena, HBK, looking back WWE did the right storyline making the fans wait until that right moment to give it to him, I remember his promo with Eddie were Eddie pretty much said Chris couldn't do it and the passion Benoit showed in that promo was/is enough to show he WANTED that spot.
Kane, he was a former World Champion so even if it was for a cup of coffee but he still made it to the top. WWE really made people wait to long for Kane to get ay World title. They'd jobbed him out so much and made him look poor Kane becoming Champion wouldn't of been believable had it not been for his storyline with the Undertaker. Still he deserved a long run and got it, shame about Edge winning it but to keep Kane's royal rumble match apps in tat he had to drop the belt.
Rey as well in 2006 his win was pretty epic but had it not been for Eddie dying Rey wouldn't have been World champion for a while, thou his 2010 title win was pretty unexpected so came more of a surprise.