Here's a bunch...
SizeQueenSupreme writes from a first-person woman's point of view about her conquests with hugely-endowed studs. Some of my favorites are
Holly Is Not a Whore,
Sizably Exercised,
The Skater, and
The Bradshawshank Redemption.
Check out the
Oasis Pool Club series by
Tanyastoes. Super hot story about a college dude with a giant cock who basically gets his dream job as a lifeguard and proceeds to bang many incredibly hot women. Excellent writing all the way through with incredibly hot, descriptive sex scenes.
Another favorite is the
Coaxing It Out series by
ChestnutDD - about a lucky well-hung high school jock and the super-stacked female nurse and principal who insist on draining his balls.
Now onto stuff that isn't for everyone - the "nerd-bully" genre whereby the bully usually makes the nerd's life hell while thoroughly dominating the women in his life. The best one going is
Brad The Bully Seduces My Mom, currently a 7-part series still in progress. Fair warning, it is not a happy tale. The title character (a cocky football player) abuses the nerd to no end (physically, mentally, and emotionally) while turning the nerd's hot mom into a total bimbo whore. Very intense and extremely hot if you're into this sort of thing. Great narrative layering, with the mom gradually encouraging her son to be a submissive cuckold. The nerd eventually meets a nice, curvy Latina girl and of course things don't go so well for him.
Along similar lines is
Roommate Relations by TripleL. Your basic "bad-boy roommate with a huge cock steals the main character's girlfriend" thing. Strong themes of betrayal and humiliation that intensifies with every chapter.
Adopted Brother is another good one. A short 2-part story whereby a wimpy guy with a small dick loses his girlfriend to his asshole adopted brother. More humiliation and hopelessness for the under-endowed in this one.
That should keep y'all busy for now. I'll add more of my favorites later