Melvin Guillard comes to minds. I'm too lazy to look up who else has fought as consistently over the last year 18 months.
probably kos or struve but for real stuve should be considered by his next fight it is 6 in 2 years jones in that same area as well. if stuve doesn't get hurt hunt he could take a short notice fight and make it 7 in 2 years.
Matt Brown had 4 in 2012. Mike Pyle is 5-1 in the last two years and he is 37. That's pretty active for his age.