where fraternities stand right now (in my opinion)

First off, no fraternities are bad on this campus. Apparently they have fraternities that play dungeons and dragons on the weekends at Maryland, so UD Greek Life is doing pretty well.

Fraternities in order:

Top:
Sig Ep, Sig Nu, KA, SAE

Why?
Sig Ep, is the most well known and well liked fraternity on campus, I think they're good dudes, other people would say they're soft, doesn't matter all that much in the end. Sig Nu is a close second, they own the lax bro prep boy vibe. Overall these four clearly have the name recognition and vibe of top level fraternities. KA and SAE might not be what they used to be, but they're still top level.

Top-Mid:
Kap Sig, Sig Pi, Machi, Fiji

Why?
Kap Sig has a top level feel, but they're barely active around campus, their social scene is less consistent than the top four and they rub some people the wrong way. Sig Pi isn't very well known but they're cool guys and have events with top level organization. Machi is still making it happen, it looks like they're starting to fall off a bit, but the brothers are still cool as hell and they still mix with top level organizations. Fiji is kind of in a weird flux between top and middle tier, but they're very active around campus and their social scene is consistently pretty good.