Here are three stocks with buy rank and strong income characteristics for investors to consider today, March 21:Archrock, Inc. (AROC) : This energy infrastructure company has witnessed the Zacks Consensus Estimate for its current year earnings increasing 9.9% the last 60 days.This Zacks Rank #1 company has a dividend yield of 3.5%, compared with the industry average of 0.0%.Bank7 Corp. (BSVN) : This bank holding company for Bank7 has witnessed the Zacks Consensus Estimate for its current year earnings incre ...