^lol now we're really getting complicated. I'm not a biologist or anything, but do like catching many different species and love knowing what I caught, even if I have to do a little research when I get home from my trips. So many species, so much to learn. Anywho, here it goes.
Striped shiner- pretty much your second pic. That one is a pretty good sized one and it's in full spawning mode. Most are just silver and a little smaller. http://www.dnr.state.oh.us/Home/species_a_to_z/SpeciesGuideIndex/stripedshiner/tabid/6773/Default.aspx
Creek chubs- compared to striped shiners, they look more like fall fish. Where I fish, striped shiners are actually more common, but in some of the real small streams creek chubs are present. http://www.dnr.state.oh.us/Home/species_a_to_z/SpeciesGuideIndex/creekchub/tabid/6599/Default.aspx
River chub- can get bigger than creek chubs and are more silver. Scales seem bigger too. The males can get a pretty big head. They're actually pretty good fighters http://www.dnr.state.oh.us/Home/species_a_to_z/SpeciesGuideIndex/riverchub/tabid/22148/Default.aspx
Hornyhead chub- smaller than river and creek chubs but they're similar. The mouth is more towards the bottom of the head. I've only caught a few of these. http://www.dnr.state.oh.us/Home/species_a_to_z/SpeciesGuideIndex/hornyheadchub/tabid/22147/Default.aspx
All three of those chub species, as well as striped shiners even, can get those "horns" on their heads.
I don't know much about fallfish, they aren't around where I fish.