New member here so appreciate I have next to zero credibility, but an XT3 user specifically for video.
I was using an XH1 last year and an XT20 the year prior, but the XT3 is by far and away the best hybrid I have used to date.
I use mine on a Sirui freestanding monopod only so have no issues with it not having IBIS (and use my XH1 for anything handheld).
I don't use any native lenses, but principally the Sigma 18-35 with variable ND and the Fringer Pro and eye AF and whilst it's not quite as fast as Fuji's own zooms, it's actually pretty good, even in low light.
Where I find Fuji's eye and face AF doesn't work so well is at a distance, but the April firmware looks like it's going to make it quite special.
When I need something longer, I swap over to the Samyang 50mm T1.3 which is a superb '75mm' equiv option. Manual focus only.
But why the Sigma 18-35 over any native options?
Quite simply, f1.8 throughout the focal range. Meanwhile, Fuji's own 16-55mm is at f2.8 and the 18-55mm at the longer end, f4.
As a wedding photographer who also shoots video, the low light capability is a must for me as is having AF for the times when I need the camera to be recording whilst I'm shooting stills at the same time, such as entrances/exits/confetti etc.
Heavy/bulky? Yup, a bit, but a couple of inches shorter than the MK lens and including the adapter, faster and 1/5th of the price...though I'm considering one for next year!
Want to go lightweight and mobile... the pancake-like 15-45mm is great outdoors.
Ninja V next to replace the Feelworld 5" I was running last year.