all keywords tools are inaccurate, just find a way to work with, not much left of a choice really, you can paid for tools like SEOcockpit but still gonna innacurate i guess, long tail pro is good to, thats more for finding micro niches tho, that will be working against Google in my opinion, you gotta "follow the Wale" follow the money and trends, dont get into a obscure niche, hope it helps