There are just as many weak tall people in OP as there are strong. Duval is not an exception. Jerry from CP6 was Admiral size, horned VA is around there size, Franky family has some big guys. Sandersonia&Marigold are around WB's height, , Bleheim is Moria&Kuma size but probably not as strong, Aphelandra is huge, Peterman, list goes on.
@Emerica4u:
Look at how much stronger smoker has become just from Loguetown, maybe he wasn't fighted to his potential at Loguetown but at Marineford he was fucking epic. With an increase like that in 6 monthsish i can imagine him being at or near Admiral level. He's a Logia after all.
He blindsided a distracted Luffy and tagged him with his Jutte. Why is that epic? Jutte didn't even damage Luffy that much since he instantly recovered and tried to retaliate. Without his logia intangibility he'd put up a fight but pre-TS Luffy would likely kick his ass.
Doens't make sense that Smoker is as physically powerful as Luffy who go can go toe to toe with Rob Lucci and Magellan and got good shots in on two decent Haki users. Smoker be a hell of a lot stronger after 2-years but only strong enough to not be man-handled by current Luffy. Any fight between them will probably be interrupted before Luffy starts whipping out Gear Stacked moves.
Rear Admiral and then Vice Admiral after he plays a big role in an arc again like Alabasta. Smoker then refuses to accept the Admiral position that will open up much later in the series when the new Fleet Admiral's replacement is taken out, or maybe Kizaru is he never becomes a major figure. Either he didn't get a post war recap because Oda wants to surprise us or Oda is trying to diminish Kizaru's role.