DH sleep problems

my DH sleeps soooo deeply. he is impossible to wake up in the mornings. I don't like who it makes me when I'm trying to wake him up. I get so angry and frustrated so quickly because he just won't wake up. it doesn't matter if I try to be sweet and speak calmly or if I jump, scream, and yell, he still just won't wake up. it's like trying to pull someone out of a coma. when he finally wakes up, he doesn't remember the hour worth of constant begging I've been doing because he was so asleep. we don't drink or do any drugs. he just sleeps at a 5, when most sleep at like a 3. he's had a sleep study done. any advice? the only thing that works is waking him up with sec, but we have a one year old, and we don't always have the time, and honestly, I don't want sex to become just a tool to wake up my husband.