Top two - Drunella cornuta female subimago (Blue Winged Olive)
Third - Maccaffertium vicarium female imago (Gray Fox)
Fourth - Probably a Hydropsychid
Fifth - Leptophlebia spc. female imago (Borcher Drake)
-Cornuta is much darker, and has wide fore-tarsae.
-Vicarium is the March Brown (darker mottling). Fuscum is the paler "Gray Fox".
In my experience the olive hue is more pronounced closer to emergence. The longer away from the water the more it seems to change.
-possibly Caucci's Ephemerella "X".
Sorry Kurt, it's the femur I'm referring to. The Drunella nymphs have a very wide femur, and it shows up (although somewhat reduced) in the adults too.