Piper Aztec, top of my head it’s got a 12000’ SE service ceiling.
Honest to goodness airplane with not a bad bone in its body.
SE at SL will climb at 500fpm with your feet flat on the floor.
Training weights ( 2+full fuel) will put you 1800-2000lbs below max take off weight.
Only downside is two thirsty IO-540’s but in Training mode I’ve gotten it down to 26-28 gallons/hr.