Ha. 1DX series. Not my league. Neither use case nor size nor price.
My personal ranking
#1 - EOS M (original) - honestly
got it in 2014 second hand, hardly used, mint condition for only € 190 and today it is still by far my most used camera. Got more images with it (close to 100k) than with all my other Canon bodies combined. Simply because the darn thing is so small and light and has good enough IQ for me. Yes, the old Canon 18 MP sensor.
Of course it is no suitable tool for any sort of "action" and lack of viewfinder is a huge sacrifice for me. But for my travel, city trips, countryside excursions, street, mountaineering, backcountry skiing it is always with me and it always delivers. Build quality is very good, it is one tough little beast. Amongst a few other mishaps I once lost it in kneedeep powder snow on a ski randonee tour. Trying to find it, i fumbled and slipped and scratched it with a ski edge, finally dug it out, wiped dry and it continued to work as if nothing had happened, except proudly wearing a minor battle mark. Mostly use it with a very good copy of EF-M 18-55 kit zoom, lately also 18-150 and/or 22, 11-22 - depending on situation and ideas.
Was on lookout for a "worthy upgrade" all along, but either no viewfinder (M6, M6 II) or not enough of an improvement (M3) or too big (M5). M50 was very close, but never pulled the trigger because with the viewfinder bump it will not fit into my miniature LowePro Dashpoint pouch. Now hoping for a successor with new sensor (32 MP) and further improved AF in smallest possible form factor - ideally with pop-up EVF "like a G5X II on steroids".
#2 - EOS 5D III
#3 - EOS 7D
#4 - EOS 40D [also used mainly with 17-55, as well as 10-22, 70-200/4 L, 60 Macro]
#5 - EOS 350D