Absolutely. Edelman, Amendola, Hogan and Mitchell are all locks--so there's 4 right off the bat. We won't count Slater for an actual position in this exercise, so let's assume one more spot.
That last spot should be a battle between Washington, Dobson, and Martin.
Guys like Harper, Lucien, and Carter should all be fine practice squad candidates. Maybe one of them develops and eventually contributes something down the line. The fact that Harper plays ST and knows the system likely gives him a leg up in that PS race.