I have Tortec velocity racks on three of my bikes. You probably won't find a thinner rear rack, Also very light - 391g. I use them on road bikes without eyelets, mounted with P clamps. Despite being very narrow, I have not encountered issues with fender clearance. Silver or black. 55lb capacity. $22. I use the rack just as you have shown above, with one bag, for commuting.
https://www.bikeforums.net/classic-v...nko-storm.html
https://www.bikeforums.net/classic-v...nko-storm.html
https://www.jejamescycles.com/tortec...SABEgJgzfD_BwE
1977 Zebrakenko Wind