For pro-grade build, all-round performance, image quality and a fast, constant f/2.8 aperture, the RF 24-70mm F2.8L IS USM is simply the all-time best Canon standard zoom lens... But it’s a very expensive lens and if it’s beyond your means, the new RF 28-70mm F2.8 IS STM is appealing at about half the weight and price.
For a more expansive zoom range, the RF 24-105mm F4L IS USM is the top option but, again, the downsized RF 24-105mm F4-7.1 IS STM is quite compact and inexpensive. The RF 24-50mm F4.5-6.3 IS STM is unbeatably small for a full-frsame zoom, if you can do without telephoto reach. For specialist lenses, the weighty RF 28-70mm F2L USM is great for events, while the RF 24-105mm F2.8L IS USM Z is a true hybrid for stills/video. And naturally, the RF-S18-45mm F4.5-6.3 IS STM is ideal for APS-C format EOS R System cameras.