WAR is an interesting utility that can be used in conjunction with other stats, including traditional and SABR, though it is far from a be-all-end-all (as many of its most fervent fans around here may like it to be [they don't say that, but the fact that they reference that stat almost exclusively indicates it]). In terms of Gene Tenace, perhaps WAR overrates him. In terms of Bill Madlock, I think it underrates him. Baseball players are not computer printouts of numbers, they are human beings performing a task, which means human observation is needed to fully and completely analyze the task they are performing.
Though Madlock is not a Hall of Fame baseball player, he was good at performing within his skillset--making contact with the ball. Modern baseball analysis seems to overrate the walk, but it also underrates the ability to not strike out frequently, which is something Madlock did. I think that adds to his value (though I must wonder if, on occasion, he would have been better to strikeout than to hit into a double play, which he did a bit).
It shouldn't be forgotten that Madlock also hit when it counted. He had a .305 batting average with runners in scoring position, and better yet, he hit .390 with the bases loaded. With runners on second and third, he hit .354. He hit .314 in tie games, nine points higher than his career average--in fact, he was a better hitter in clutch situations than when his team had the lead, as his batting average during times they were ahead, he hit only .285.
(Judging by his career performance, I think he may have been a better #2 hitter as opposed to #3 hitter, too.)