Kinda depends what you want; which is more important to you: size, price, image quality, max aperture?
I don't have any of the following (yet), so my comments are based on what I've read/researched:
16-50mm kit lens is not the best, but a lot of people like it, and it's small and cheap.
Sony/Zeiss 16-70mm f/4 is well regarded, but larger and more expensive.
Larger and more expensive still is the FE 24-70mm f/2.8 GM
For primes the Sigma 19mm f/2.8 DN and 30mm f/2.8 DN are good quality at bargain prices.
The Sony 16mm f/2.8 and 20mm f/2.8 pancakes are smaller, but more expensive and not as good as the Sigma 19mm
Sony FE 28 f/2 seems to get a lot of good reviews, and is a good value
Metabones adapters seem to be the best for reliability and auto-focus speed/accuracy. They have both a straight adapter and a speed booster for Canon EF to Sony E mount.