Luckily I don't even think you must look outside of the organization to upgrade on him. With how Blueger has seemingly blossomed into a 2-way 3C, I think your have your top-9 completely set already with:
Guentzel-Crosby-Rust
Zucker-Malkin-Kapanen
McCann-Blueger-Tanev
I would rather flip Crosby and Malkin, but that doesn't really matter that much. That's a really good top-9 group. You just need a winger for Sceviour and Jankowski, which can be any of ERod, Lafferty, O'Connor, ZAR or someone from outside the organization. I'd love to acquire another Tanev type of speedster for the 4th line, but you don't need some big name addition.
I don't think ZAR is a great comparison for ERod but I think Wilson is a really good one. Both were great analytically and neither really brought any skillset that stood out, and both appeared to have a pretty rapid drop in play after a short window of being really effective players.