The crock-pot pork tacos sound delicious but may fall a little short on the "elegance" front.
Grilled steak is the coward's way out, and a damn good one. Steak, mashed, and creamed spinach or brussel sprouts. If you go spinach, you can make it morning of, or even day before -- it only gets better. Caesar salad to start, and store-bought cheesecake to finish.
If it's dinner for three or four, you can make a fancy-shmancy pan reduction to finish the steak. If your stove is overloaded and you don't have the pan(s) to handle steak for your number of guests -- grill it and serve with a compound butter. Compounds are making a big comeback, and are hard to beat for elegance. Rib steak in particular goes well with a simple creamed horse-radish on the side and a jus on the plate. Or you could go for an old fashioned fillet based classic like "Steak Diane," where most of the work is in the shopping.
Schnitzel -- veal, pork or even chicken is another possibility. There are a lot of possibilities in terms of saucing, but it's hard to beat a lemon squeeze.
All of this is extremely easy stuff which you can toss off behind your back blind-folded; and yes, it's elegant. Good wine, nice china.
Good wine, nice china, and good luck,