Vilku said:
an ability to see you in relation to the world and the world in relation to you.
Well you have a particularly Ni definition of "grounded" then, since you're calling "grounded" the ability to see through two opposing perspectives. If that's "grounded" then your grounded types are INFJ, INTJ, ENFJ, and ENTJ.
The Oxford English Dictionary defines "grounded" as "well balanced and sensible", which would describe any healthy Sensor or Thinker.
A few things on Sensors.
ESFPs - They navigate life to maximize enjoyment and have a knack for getting themselves into opportunities.
ESTPs - Also opportunists who utilize the flow of life. They tend to live intensely and find joy in the rush.
ISTJs - Steady, calm, loyal people. They get satisfaction from doing a good job and contributing in a positive way.
ISFJs - They get satisfaction from the small pleasures of life and by protecting and supporting those they love.
What I don't understand is why these types are a bad thing to be in your mind. In my opinion, S doms are some of the most grounded in that they are the most aware that we ought to enjoy and experience the world moment by moment, and make the most of what we have. So many Ns are dissatisfied in life and are always looking for another pasture, while Ss are living life to the fullest with what they have. It's been ground into our N heads to look beyond our boxes, but the fact is that a huge amount of our life is going to be spent inside the box - Sensors get that, and don't necessarily
like it, but they work with it. They learn to navigate and enjoy it (Se) or they work to improve it and protect the people in it (Si). I think most Ns could learn a lot from them.