Sony fx30 catches my eye
not too big, not too small
Many of the cine-focused mirrorless cameras expects some additional add-ons to become fully operational as video cameras - it may be an articulated screen, a handle/cage, preamps for real microphones or external sound recording etc.
It is worth emphasizing that movies are really 51% sound and 49% image.
Reflect for a moment: Isn’t it much easier to enjoy a film with good sound and less than perfect/“experimetal” images than sitting through the most beautiful pictures accompanied by awful sound?
Even if you don’t agree; still photographers tends to forget the importance of sound.
The easiest and most convenient video cameras, aside from a smartphone, that comfortably operates without loads of add-ons, is a “good old” camcorder.
Like with cameras, smartphones have cannibalised the lower end of the camcorder segment, but one can’t go wrong with a Sony or Panasonic camcorder of good quality - they are still very relevant.
Depending on model, it may still be necessary to get a XLR preamp unit or an external recorder (or both) and the necessary microphones that fits the purpose of the project.
But, a camcorder is usually self contained when it comes to ergonomics like articulated screen, handling, focusing, zooming etc. They are after all dedicated tools.
Other worthwhile considerations would be the editing process, format ambitions etc.
For example, full HD recorded uncompressed and properly color graded footage may look vastly better than a compressed 4K recording. An old cheap high-end camera that maxes out at full HD may not be the worst choice.
Editing software and required computer power will also be a part of this equation.
I can’t give any current camcorder model recommendations. The brands mentioned are generally good. The project requirements would define the choice.
If I were to buy a mirrorless with intentions of video production, I would choose the Panasonic Lumix GH(x) model that most closely matches the requirements of the project.
The m4/3 sensor size resembles the 35mm FILM frame size more closely than a 24x36 sensor.