In family rooms where the TV is almost always on, don’t try to hide the action. Dress up the mantel with just a simple, long and low arrangement like this wooden planter box that can be filled with different things as the seasons change. A row of pillar candles, or a grouping of short, square glass vases would also work.
Alternatively, you could flank the TV with two taller arrangements of items. If you go this route, don’t feel you have to stick to only one item on each side as shown here. Get creative and form symmetrical groups of three objects, like a set of wall sconces, matching vases, and a pair of candlesticks, for example