I remember a Pena guy telling everyone how he studied horses, Burke guy is the same, Surick became a genius, & there are probably many more. Those mentioned were all on social media. There are a host of others who are very confident of their ability. They choose not to brag.
The common denominator is the juicing trainer. Pena, Allard, Oakes, Burke, Bongiorno, Alexander, Banca, Chansky, & many others would make most look good. It is a simple formula. Buy a decent horse from a smaller stable & give it the magic. In most cases that horse becomes very good & sometimes great.