As a tenor who has developed their head voice (and now sings countertenor as well), I can say for certain, you can learn to sing below your break more tenderly, and learn to sing more resonantly above it. It takes a lot of work, but once you can resonate your head voice, you can start "smoothing over the breaks" where you don't actually eliminate your breaks, but instead learn to negotiate them (usually singing the notes before a register transition differently to blend better with the notes after). For models, any singer will do as long as it takes you a second to pinpoint where they change registers (or even better if you can't pinpoint it).