A halfback and five-eighth, 22 year-old Cornish will join the side from the Canberra Raiders, where he made his NRL debut in 2014 and was named in the 2015 NSW Cup Team of the Year.
21 year-old Tanginoa will return to the forward pack of the Eels from one season at the North Queensland Cowboys, after making his first grade debut in Blue and Gold in 2013.
He will be joined by 20 year-old versatile outside back Schulte, who was part of the Cowboys’ Holden Cup squad this season.
“These three players will add a lot of depth in key positions to our side for 2016, and I’m looking forward to having them here in November,” Eels Head Coach Brad Arthur said.
“I’m sure we’ll have a very healthy competition for a place in our first grade side this season, which will only improve our team.”