Aren't you milking this name placement thing at this point? Kaido, Big Mom and Whitebeard were all characters relevant in the Wano arc, and pirates in recent years that the Marines who weren't old enough to know about Rocks would have known a lot about. While power is obviously relevant, I doubt it is the only factor, and Shiki was named the first of the other group anyway, his name is supposed to be a big deal like the others. Plus, we have Oda in the SBS saying that he wanted Whitebeard to highlight Shiki with Roger,Garp and Sengoku as the big names back in the day
Shiki nearly murdered the man, only stopped because of a storm