That is a really nice family portrait you have there!
I am also a bit taken by the relative size comparisons. The RF 10-20 had caught my eye as small, but I hadn't realized it was just a bit bigger than the 14-35. I had also been thinking the 100-400 might be Canon's replacement for the 70-300L, but was too tall to stand up vertically in my bag. But, looking at that, if it is too tall, it isn't by much.
The 24-105 f/2.8. I don't see much hype, but that is one sweet lens. Incredibly rapid AF, and great IQ. I already liked it a lot, but it is growing on me each time I use it.
I've rented the Sigma 14 on two occasions. Great lens. I also would consider the Sigma EF 20 f/1.4 lens as a great astro/nightscape lens. A friend owns one and I've borrowed it a couple of times. I had been hoping the shorter flange distance would allow for some real improvements for a wide angle and fast prime. Still waiting, but if I were to buy today, it would be one of the Sigmas.
Haha....no, I haven't played with a Laowa lens. But, I will say the block on 3rd party RF lenses has at least partially been lifted. We'll see where it goes. I know many have been clamoring for 3rd Party alternatives. Unless something unique really catches my eye, I'll tend to stick with Canon.