All of them are great.
When film scoring, I've found 7/8 to be like the best when needing to be flexible, especially in action sequences. Why?
Well, on this recent project I am working on. I challenged myself to avoid having any type of tempo changes whenever possible. Now, this doesn't always work because there are scenes where the natural pacing of a scene is rather slow and goes into a faster paced feel (ie; the transitions into action sequences). In most cases, you could simply choose a tempo that works well in both half time and normal time so you can write elongated phrases at the faster tempo and then change to the correct feel without changing tempo. This is just all technique at this point though. Either way can work.
Why is 7/8, to me, the most flexible? Because you are dealing with the absence and/or addition of that 1/8 note duration. That one 1/8 note is what separates us from a straight time feel of 3/4(6/8) or 4/4. That means you have options when needing to hit your marks without adjusting tempo. How you musically frame your phrases is what matters in terms of keeping the music sounding like makes sense though, haha.
Now, because I consider 7/8 to be the most flexible, I use is sparingly. I will write some sequences in 7/8 because the sense of urgency you can get from that time signature is great. It's especially fun to do a variation on the themes of the film that are in 3 or 4 and rewrite them in 7/8 too. However, sometimes you just need to keep that straight time feel thus 7/8 time signatures can come in handy as those "clutch" saving transitional measures that you drop in to hit those marks. Again, action sequences and scenes in general flow like a piece of music. They have a development and a climax and tons of visual transitions to set up cadences (visually speaking). For me, it's not difficult to figure out those key moments but it certainly took me sometime to develop a sense of how to musically hit those marks naturally to a set tempo.
That is why I find 7/8 to be the most flexible (and forgiving) meter to work in. You could make the case for 5/8 or 9/8 too but 7/8 is the only one that is 1/8 from both 3/4 and 4/4 which are arguable the most used meters out there that the masses understand and feel naturally.
Best,
Chris