If you've seen 9 of the films, you should see Voyager if not for other reason but because it has stories that are worth seeing much more than half of those films. Although, unfortunately, like all the other Star Trek series the good episodes begin somewhere after the second season, but you can always find ratings online and skip the bad ones. Some of them are important for the Voyager timeline, but you can watch them lazily over supper or something.
Everything except Nemesis takes place before Voyager in a sense, and I regret watching Nemesis, so it has no relation to the timeline. Note that things shot after Voyager might have references to concepts invented in Voyager even though they are earlier on the timeline, but I don't think that's something anyone should worry about.