Not sure how those guys compare to a Ricky Collins but I wouldn't say a single player on that list slipped through any cracks. A couple might have been mistakes to let them go, in hindsight, but they weren't players that got missed.
Khari spent 3 years as back-up to Damon Allen before the Bombers traded for him.
Nash was cut by Montreal an year and a half after being an all-star.
Coleman was a 3 time all-star who left the Stamps to play in the XFL and came to Winnipeg as a FA.
Bolden only played for us or in the NFL.
Sellers signed as a FA after being getting into trouble off the field while in the NFL.
Brown's story is well known. Wally wouldn't pay what he wanted so his rights were traded.