Hello there, welcome to the club, the LF whore club.
Now allow me to point you into the direction of the "Liberator". Well balanced and can go toe to toe with a VHF if you know what you're doin'. May not be the most agile, but as one hella'va small hitbox. Coupled with a good standard powercore and averagely good armor, it is one good fighter.
Next up is the "Griffin". Little bugger has a huge surface area from the top and bottom. Turning sideways during a fight will best minimize your flaw. Take advantage of it's superior agility as one of the most, if not the most agile light fighter capable of holding 4 guns.
Then there's the "Hayabusa", another personal favourite. A hitbox that is night impossible to hit from the front, and your enemy will always see your front, taking into account your amazing agility, second only to the Arrow. The only downside is your 3 gun firepower which can be a bit of a letdown when it comes to dishing out damage.
Oh lookie, something tinier than a "Hayabusa", it's the "Arrow"! The speediest light fighter in the game is basically two guns strapped to a rocket. With two guns, your firepower is limited. However, you'll run circles around the enemy with one of the highest agility levels in Discovery. Pack a CD and Screamer, put out his shields and fire away.
The "Scimitar" falls on the heavier side of LFs, carrying 5 guns instead of the usual 4. The turret may come in handy but do realize that the turret comes at a price. Your agility is noticeably lower and you are quite easy to hit. Vertical strafing and sideways turns make the most out of your low profile.
One more little tip. As much as you feel that nukes are a good way to win in an LF, a word of warning, you will get blown up by your own mines. My suggestion is to steer clear of them and use Screamer mines instead.