Dividend Kings—companies that have paid increasing dividends for 50 years or more—are great for long-term portfolios. Finding ones with buy recommendations from top financial firms gives investors a better chance of gaining capital and dividend growth. Dividend Kings are also especially great when you can get them cheap. With time, dividend increases, and solid reputations and business acumen, you know you’re in for a comfortable upward ride. So, today, I’ll screen the top three cheapest Dividend Kings with buy recommendations. How I Screened For These StocksFor this analysis, I used the Barch…