Slater
Headphoneus Supremus
For me, by fitting the core of a smaller tip inside the core of a large tip, the tip stays higher on the nozzle, no matter how hard I shove them in my ears, providing excellent fit. These things are amazing!
You Blon owners can also try a set of Flip Tips, as the bottom of the cores stick down longer than any commercially-available tip (even longer than Spin Fits).
https://www.head-fi.org/threads/flip-tips-prepare-to-have-your-mind-blown.906357/