They all would be ok LE experiance but if you really want an agent job you might want to try for a Uniformed position that is "covered" under 6c. Some of the jobs that are not will look good as experiance but not as good as a covered job. Your best bet is Border Patrol because they are always hiring people as long as your willing to work the southern border for a few years which is really the place to be for action and diversity. Down there they are always getting into things, lots of drug seizures, shootings etc plus they do foot patrol, vehicle, boats, four wheelers, horse, aviation...they got it goin on! There are other covered jobs, Bureau of Prisons is, I think Federal Protective Service is however they are a journeyman GS-5 or 7 I think. There are others, you just have to look.
I am a Paladin, like the warriors of old, ready to stand on the line to keep others safe... A Sheep Dog, ready to protect the herd from advancing wolves!