Could I benefit from some filler under my eyes?

Based upon the photos provided, you would be a candidate for dermal fillers.  I would start with Restylane.  It likely that you will need more than 1 syringe.  I would recommend that you go to experienced cosmetic surgeon so you can avoid potential problems of lumpiness that can occur with a less experienced injector.

Yes, you are a candidate for tear trough fillers. These fillers (belotero, volbella, restylane silk) are good for under the eye, but keep in mind, a combination approach will give the most improvement. Fillers combined with lasers, and microneedling/PRP can improve under the eyes. My patients try to get non surgical treatments to avoid surgery. We use PRP and stem cells there often. I suggest consulting with an expert to develop a treatment plan best suited for your short and long term goals. Best, Dr. Emer