The French pair have been on the fringes of the first-team picture at St. James' Park for the majority of the time since their arrivals in 2011 under the management of Alan Pardew.
Former Manchester United flop Obertan has played just 76 first-team games in nearly four years on Tyneside, whilst ex-Rennes man Marveaux has made only 13 Premier League starts in the same timespan.
Marveaux has not played a single minute of competitive football this season and Obertan has not featured at all since September, but Benitez, who is the fourth manager the pair have played under at the club, has revealed that there is no reason they cannot have a role to play in the coming weeks.
When asked whether the Frenchmen could feature under him, the Spanish boss told the Chronicle: "Yes, for sure, they are working hard. They are listening to us and trying to do what we are asking them. I think you can see the commitment from everybody.
"We can’t complain about anybody because they are working hard and they are ready. And even when they have little things going on they are ready to train and impress."
Benitez will want all hands on deck as he faces arguably the biggest challenge of his managerial career to date with the Magpies.
After Aleksandar Mitrovic's late header earned him his first point as manager of the club, the North East side are second-bottom in the Premier League table with just eight matches to go.
Benitez's men have won just two of their last 14 Premier League matches and are three points adrift of safety, albeit with a game in hand over 17th-place Norwich City.