If by "Closest to TNG" you mean this supposed big budget feature came across as a mediocre TNG TV episode withj HORRIBLE dialog and juvenile humor that really wasn't funny with lines like:
Nice snark, but no, by closest, I meant in terms of story and concept. TNG was not an action show (First Contact) and wasn't ever anything so tonally dark (Nemesis). Generations was closest in tone, Insurrection closest in story. First Contact was easily the most enjoyable, but didn't feel like a continuation of the show.
That said, none of the classic films felt like like a continuation of TOS. My point was simply that Insurrection probably started as an attempt to properly capture the type of story the show was known for, but got off track trying to turn it into big feature film, and it eventually just got turned into a garbled mess of jumbled ideas and tonally inconsistent attempts at action, humor, and bombast, none of which the show ever excelled at.