That's a pretty broad question. What are you shooting?
Are you working on narratives in a controlled shooting environment, with a more cinematic style where prime lenses would be a better choice?
Are you working on documentaries or event video that's faster-paced where a zoom lens makes more sense?
And if you're in a place where a zoom makes more sense, what are your particulars? How wide do you generally need to go? How long do you generally need to go? There are lots of zooms, but depending on your practical shooting range you may need a couple of zooms to cover a wider range of focal lengths.
Also, what's your budget? You could certainly go for Canon L lenses, but if you're on a tighter budget there are some mighty fine lenses out there that cost a bit less.