I do disagree with a few of those. Maybe in the old days, but no longer does that list completely apply.
Fire- Definitely Elias. Something very classic about him, and he did create Dark Fire, which was pretty much the pioneer to advanced fire elements. Elias is the reason I came to appreciate and master fire, in fact. Ali is a close second, though. He probably has way more fire techniques under his belt in addition.
Water- Izuna. Few others can rival his prowess in Suiton ninjutsu.
Earth- BishamonSama. He is, always has been, and always will be the best Earth user NarutoBase has ever seen. Goro and Hiruzen, his apprentices, of course, are next.
Lightning- Probably Madara Uchiha. Lightning isn't as heavily-studied an element as the other four, mainly because it's rather difficult to understand and to develop new ideas for.
Wind- Definitely -Naruto Uzuamki- (Kyle). I really don't need to say anything else. Skye was exceptional in the past, but he can't hold a candle to Kyle in this area.
Ice- Zanji (self-explanatory).
Wood- Scary Yamato, without a doubt. Shodaime was good, I suppose, but he never displayed the inventiveness and understanding behind the mechanics of Mokuton that SY has.
Taijutsu- Probably Zen >_>'
Hells was the original Water Sage, and he held the title for a long time. Izuna and I both contended for the position in our earlier days on NarutoBase. However, I'd say Izuna has since surpassed Grimmy in Water usage. There is, in my opinion, no one better. Honestly, in a fight with Izuna, you'd better hope there's no water around.
with my Ice bio I don't fear Izuna's Atlantis combo
