You rang?
Take a look at the
List of Earth-like worlds, especially the
Google Sheet. TChecking the frequencies on the list, you'll notice that generally, A and F give you the best chances, especially coreward. However, with A stars, you'll only want A7-A9. (See the exact star type on the galaxy map.) These are followed by K, then G. But if you want to maximise your chances, I'd recommend setting it to F only. Star density in that area is high enough that the route planner should still spit out a mostly straight line.
I would otherwise recommend against filtering though, because you never know what rare kind of ELW you might pass up on.
The vast majority of ELW-s found to date are around F,A,K,G,M,NS (neutron star) stars, in descending order. Take a look at the "By Star Class" and "By Luminosity" subsheets, you'll see what I mean.
Good luck with finding one! (And two, and three, and...)