Black Lagoon and several others actually have /a/'s stamp of approval as far as dubs go. The dub of R.O.D. the TV is one such, in that it uses ACTUAL KIDS for the kid roles.
Geneon, unlike a lot of companies, actually did seem to try and choose appropriate actors for the characters most of the time (not all of the time mind you) but most of the less hated dubs are from Geneon. The only other ones are more nostalgia-y (like Cowboy Bebeop, Tenchi Muyo!, Outlaw Star, Gundam Wing, G Gundam, anything that aired on Toonami in the 90's) but the one dub that I remember /a/ liking was Cromarite High School.