Help me run an ethernet line

Here is my situation:
My house has a little landing on a second floor with a subfloor/bracing system (I have about 8-12" between floors) with a built-in TV stand. This is not my main TV viewing area. As you look here, we are about 10ft from the attic wall on the L side.
Directly behind this wall you are viewing is a bedroom
Up top, we have wide open space where I can stand tall on plywood and rafters. But my "top plate" is a little more than just a top plate. I won't be drilling that...


So should I:
1) glance the drywall near the beam and through the wall which should be hidden by the crown moulding?
2) Find a long flex bit that I can run down, drill through the subfloor, and snake up from the bottom? This seems like the most difficult option because there is already coax that seems to take this path that is well-secured.
3) run raceway along the ~10ft of wall, through the cabinet? (raceway into an on-wall box and drill out the back side of the on-wall box + small connecting holes in the back of each cabinet? There isn't access from cabinet to cabinet currently, but putting grommets between them would be a simple job for me and could actually have some other applications and may be done eventually anyway)
4) Just buy MoCa adapters because they can allow 1gbps connection, nothing here is mission critical, streaming over WiFi now is currently fine, and having cat6a from a central point to every room in the house (in a usable, aesthetically pleaseing position) is overrated? It's not that I'm worried about the 'resale' or anything, but I've already got it run to basically every other place (or a plan on how/where for the few places it isn't)