Honor Harrington is a close second.
Can't possibly decide between Una Persson and Rasd-Coduresa Diziet Embless Sma da' Marenhide.
Not Catherine Cornelius then?
I'd go for Chris Guthrie from a Sunset Song unless I went for the Flounder from The Flounder (although he is more of an anti-hero) maybe Gwalmachai from Down the Long Wind, ach too many choices too many novels not enough time
Since Menolly, from Anne McCaffrey's Drongriders of Pern, is not really a "hero", I'll go with Paksennarion in Elizabeth Moon's Deed of Paksennarion trilogy
From a different medium, Spike Spiegal from the anime series Cowboy Bebop.
Let's be honest, she had terrible taste in men.
Not forgetting the fact half of Phil Oakey was modelled on our Jerry.
[Oh, and talking anti-heroes, can't beat the sheer hattage of http://www.berghuis.co.nz/abiator/pick/cugel/cugel2.jpg.]
I'm still going for The Flounder as the ultimate anti-hero. You can't beat a straight-talking flatfish.
Satan, from John Milton's 1674 epic poem Paradise Lost.