Colorado and Edmonton would still have no depth, but at least it would be a 2 line team.
Draisaitl - McDavid - Compher
Landeskog - Mackinnon - Rantanen
RNH - Soderberg - Nieto
Khaira - Jost - Calvert
Girard - EJ
Klefbom - Barrie
Nurse - Zadorov/Larsson
Cole/Sekera/etc.
Grubauer
Koskinen
I don't know if you can make a better top 6 combination between two teams (especially if you switch RNH and Compher around). However, 3rd/4th lines are just above average compared to normal NHL teams, and that defense is still meh.