what is your price range and what features do you want? mic input? headphone input? ibis? I've always felt the dmc-g7 was a good value for 4k video at $500. not too far behind the bigger brothers. missing a few features, but still, 1/4 the price at similar video quality is hard to beat!
with a isk cm-20c $30 supercardiod microphone that sounds like a $100 mic and a field audio recorder phantom powered Tascam DR-60D $199, you can have amazing video and audio for the fraction of the price.
Audio isnt much of a concern if any. Just something I can put on a stationary tripod and capture a few minutes of video at a time. Something that its possible to get good day and night(low light) footage with. Ill checkout the dmc-g7. thanks