I'm not sure if Njie will play there eventually but he's no skinnier than Gomis. You don't need to be holding off players with your back to goal just because you're the only striker, you can just he a pest and keep defenders looking over their shoulders like an Inzaghi, or barely move and let play flow around you like an Henry then burst into action, all that said he's coming in as a left winger from what I've seen of him.He looks like a professional athlete with very little body fat, given his height and slight frame I doubt he'd be very effective as a lone striker.