Follow up on this after research...
This is so unprecedented it has never happened before (best offensive run producer and best defensive run preventer in baseball). Times it has come close:
2012 Buster Posey - 5th offensive, 2nd defensive
1959 Ernie Banks - 6th offensive, 1st defensive
1984 Cal Ripken - 5th offensive, 1st defensive
1991 Cal Ripken - 2nd offensive, 1st defensive (Frank Thomas bested him offensively)
1948 Lou Boudreau - 3rd offensive, 1st defensive (3rd behind Stan Musial and Ted Williams)
1912 Honus Wagner - 7th offensive, 1st defensive
2004 Adrian Beltre - 8th offensive, 1st defensive (and a distant 8th, this was the Bonds 12 fWAR season)
1917 Rogers Hornsby - 3rd offensive, 2nd defensive
1895 Hughie Jennings - 8th offensive, 1st defensive (before stats were real)
1969 Rico Petricelli - 9th offensive, 5th defensive
1945 Snuffy Stimweiss - 3rd offensive, 1st defensive (behind Phil Cavaretta with Ted Williams away at war)
1910 Eddie Collins - 3rd offensive, 1st defensive (behind Ty Cobb)
1977 Mike Schmidt - 7th offensive, 5th defensive
2024 Bobby Witt Jr - 5th offensive, 3rd defensive
I only made the list this long to convey that I did quite a bit of research on this and nope, nobody was 1st in both in any year.