I'm partial to native warm season grasses. Once established, they don't require a lot of maintenance, useful for year around habitat, grow even in drought years, great for conservation of soil, can be easily turned back into crop land. Then if you get bored, you can set a match to it...that's always good for entertainment!
For trees, apple because you can stagger drop times over several months and don't take for ever to produce.
For shrub, not sure, still learning but have planted a half dozen types and will see if a preference developes.
For grass, winter rye is tough to beat. Great fall, winter and spring food source, soil builder and fawning cover.
White clover. I suppose that comes from me trying to get some established for 20+ years on our sand and never getting positive results, while watching all my buddies with good soil having clover fields that were over run with deer.
Grafted dolgo crab on B118 rootstock. If that's all I can have, can I have a lot of them? I'd sacrafice 10% of them per year for hinging and browse. That is as long as I can plant 10% more each year and keep rotating.
I wish there was a tree that, grew quickly, produced mast in less than ten years, could compete in a forest enviroment, produced mast every year, resprouted after being cut, edible fruit, valuable wood, etc. Oh wait...there is such a tree...THE AMERICAN CHESTNUT!
I can't wait for the blight resistant tree to be available.
In my area, with Ag all around me, one of the most under valued trees there is...the Eastern Red Cedar. Why?
1. Great cover for deer, turkeys, grouse, rabbits, ect. year around
2. Great thermal cover for our impossibly long winters.
2. Birds love the seeds and to nest in them.
3. Zero maintenance required to grow. Plant and walk away
4. Great rubbing posts. Nothing prettier than a 6" cedar trunk shredded from an angry/turned on buck