Certain, “The Largest Loser” is firstly a weight-loss express. But over the years, it’s put love-in shape competitions, like “The Bachelor,” to shame in relation to the selection of romances, engagements and weddings it can be spawned.Season two’s Matt Hoover and Suzy Preston married in 2006. Season three’s Marty Wolff and Amy Hildreth married in 2008. And just final year, season nine’s Sam Poueu and S…