Dividend Kings are among the best stocks that income-seeking investors can turn to in these uncertain days. Let's consider a duo of corporations in this category that investors should consider buying and holding on to for a while: Abbott Laboratories (NYSE: ABT) and AbbVie (NYSE: ABBV). Abbott Laboratories is known as a leader in the medical devices field although it has a presence in several other areas, including nutrition and a generic pharmaceutical unit that targets primarily developing countries.