Well, there's this:


I have no idea what the future holds in this area, but traditionally, widebody FO goes senior to narrowbody CA. And traditionally any really junior seat will occur at SFO and EWR.
Traditionally, the 777 goes junior to the 787. I've flown both and it makes sense; the 787 is a sweet ride.

A newhire should be able to get a 756 once a bit more movement happens. Keep in mind that a junior pilot won't see a 767-400 except for OE because it pays the same as 777 and 787.

But let's talk big picture. Concentrate on getting hired.

If/when you get past that hurdle, concentrate on getting through training. I recommend picking the Airbus because it's easy to learn and fly; even I'm able to fly it so you know it's not that hard a training course. But the guppy's also a good choice.

Spend your first year at the company learning the ropes. Your goal is to be wallpaper ... blend in with the walls so no one knows you. If anyone of import knows your name, it's because you did something great or something bad. Odds heavily favor the latter.

Once you're past probation and know just enough to shoot your foot off, look at going to another fleet. I'd make the stop at 756.

I don't recommend going to the right seat of a widebody until you can upgrade to narrowbody Captain; it will likely happen a bit before you can go to widebody FO. That way, if you are not compatible with widebody flying, you can immediately upgrade to narrowbody CA without having to spend a couple of year miserable in the right seat of a widebody.

Just my dos centavos.