Maybe the 1927 Yankees. They score 35% more runs than average while having 45% more strikeouts than average. So they had 1.35 runs for every run the average team scored and the strikeout ratio was 1.45.
Their harmonic mean would be 2*1.35*1.45/(1.35 + 1.45) = 1.40
That is the highest I found for all teams from 1920-2020 (the 27 Yanks were 3rd in relative strikeouts and 9th in relative runs over this time period). Data came from the Lee Sinins Complete Baseball Encyclopedia.
Here is the top 10:
Team |
YEAR |
Rel R |
Rel SO |
Harmonic |
Yankees |
1927 |
1.35 |
1.45 |
1.40 |
Yankees |
1928 |
1.38 |
1.24 |
1.31 |
Cubs |
1931 |
1.26 |
1.33 |
1.29 |
Yankees |
1920 |
1.16 |
1.42 |
1.28 |
Yankees |
1926 |
1.20 |
1.36 |
1.27 |
A's |
1933 |
1.26 |
1.28 |
1.27 |
Yankees |
1921 |
1.22 |
1.30 |
1.26 |
Yankees |
1930 |
1.43 |
1.13 |
1.26 |
Yankees |
1936 |
1.35 |
1.17 |
1.25 |
Cubs |
1929 |
1.21 |
1.29 |
1.25 |