For starters, I would say: fip, k and bb rate, IP for pitchers triple slash line, wRC+ (if you buy park adjustements), bb and k rates, PA for hitters fielding is a little tougher But part of the problem with WAR is it tries to tell a story that is not really possible. With the margin of error, it is basically meaningless. The players that are tops in WAR would be tops in basically any measure.