Veigar also has awful laning, doesn't have anti Health passive, and has to farm Q to get it to a respectable level. As far as the Wu Kong example, that makes more sense. There are characters with better leap ins, better as steroids, better ults either for CC or for damage, hard CC outside of ult, etc.
Wukong's Kit as far as synergy goes, sure. There's not a lot of conflicting points, it's build AD and play him like most generic tanky DPS. However, when it comes to actually fulfilling that role, you gotta ask why use him when you can use some other champs that don't just beat out Wukong in some niche aspect (like being a better jungler or being a slightly better solo), but are overall better than him in multiple areas. I could play Wukong, or I could play plenty of other champs that also have "synergy" in their skill set if that's what your looking for, or even pick a champ that seems all over the place like Irelia having a color roulette of different free stats and damage types, and still be better.