We have a Whitfield Advantage II T, a Whitfield Prodigy II and a Quadrafire 1000 all on one floor of a 2300 ft ranch style home.
We don't have an oak on any of them and all works fine.
We use the stoves as we need them, based on the outside temp.
The Little Whit is fine during moderate weather, and then when it gets into the 40's we shut it off and fire the big Whit. Once the temps dip into the lower 30's F we fire the little Whit and run them in tandem.
If it gets COLD we let the Quad cycle on the stat to take up any slack.
I don't run the Whits above the low setting, as the Hazelnut shells we feed them builds too big a fire, and I am convinced that the thermal stress on the stoves on a higher setting is harder on the stoves heat tubes and the longevity of the equipment.
The shells have a lot more BTU than most pellets, so this is why we use more stoves, plus if one decides to die at a very unhandy time (when its COLD) there is heat in the house.
When and if we have to, the Quad will heat the entire house, but it's hungry when heating this much area.
A stove in every corner is my MOTO
With 3 in here now, I would love to add one that runs on a dedicated 12v system that would heat even in a power outage.
Buying good used Whitfields on a 90F +++ day at a garage sale can be a very inexpensive venture.
Snowy