Harmison's "good bowling" isn't reflected in his figures because it's just an illusion of good bowling. He just bowls short and with very little movement, hits batsmen a few times and makes them play and miss to back-of-a-length balls occasionally but he doesn't get them out. He might get the crowd going or make batsmen mildly uncomfortable (and this is when he's bowling well, on a pitch that suits him, when the crowd are on his side, when he's fully fit, when he's bowling his first spell of the match because he's took crocked to bowl any more, when there are no imminent births in his family and when Neptune and Jupiter are aligned) but he doesn't take wickets.
By all means, pick Harmison again. He'll take 1/150 for the match, his critics will say, "that should be Harmison's last chance" and his apologists will blame the pitch, and Harmison will be swiftly dropped for the following game, only to be recalled a few months later. It's happened every fifth England game for the past three years.