Im in the same boat as you.
Sublimator and Herbalizer are the best I've found.
Looking into the Glass Symphony.
Sublimator is awesome. But does best with only .15
Herbalizer can put out even larger clouds, but may be a tad more inefficient. i always seem to go thru more herb when using it. It can hold around .3 per bowl.
Both have easy maintenance
Mighty is handheld and hold .3, it just only goes up to 410 F and the extraction speed is somewhat slow for my standards.
What we are looking for really isn't available anywhere.
Im still waiting on the vaporizer to be made that allows us to stuff 1-2 grams into and just sit back, puff, and relax. Im are flavor would suffer later on in the session. But if no stirring and large clouds could be created, i feel it would be pretty popular.
Totally understand what you are looking for. Unfortunately it has not been invented yet.