For MFT, Panasonic offers a 14-140 f3.5-5.6 ( with is a 28-280mm equivalent ) that is reasonably small and a wee bit cheaper than the Tamron 16-300 that I like so well. The Panny 14-140 may be just a tiny bit smaller, and it is nice optically for a 10X zoom.
I like the MFT systems, but I do...