Lowering the stem on a Canyon Endurace
It really depends on your body proportions. Canyons have very high head tubes, so -17 degree stem is nothing out of ordinary. Longer stem is a good idea if you feel that the cockpit is too short.

For reach, in my opinion a classic bend bar is better than "ergo" because it has longer reach on the drops, which increases the difference between hoods and drops.