Honestly, almost any keyboard and any switch can be used for gaming effectively. The kinds of games you play and the keys you need access to is helpful for determining what some good options for you would be. I do most of my gaming on a 60% or tenkeyless board since I like to have my keyboard and mouse closer together for comfort.
Switch type really comes down to what you prefer the most. I wouldn't recommend Blues for FPS, but some people do well with them.