I'd suggest either a pale ale or a stout.
For the pale ale, you could use 8 - 10 lbs pale male and 1/2 - 1 lb crystal. You could also use small amounts (up to 2 oz) of chocolate malt or even smaller amounts (no more than 1 oz) of roasted barley if you want to add some colour.
For the stout,
7 - 8 lbs pale malt + 1 lb roasted barley makes a good start. I wouldn't use the crystal, but up to 1/2 lb chocolate could be good. 1 lb flaked barley (which you will have to get) works wonders for head retention, and I wouldn't try a stout without it.
Whatever you do, take careful notes. About 30 years ago, I made a stout out of left over ingredients, and failed to take notes. That brew would have put Guinness out of business if I'd been able to replicate it, but I tried many times, and never got close..