Top 5 in no particular order

#5 ( Fanfiction.net) Also I realize I have been saying .com and not .net so I am sorry for that!

Title: Moments with the Soldier and the Spy
Author: I-am-the-fandoms
Chapters: 36
Views: 86K+
Summary: A series of short one-shots about the life of our favorite soldier and the spy and the Avengers, semi-continuous at times, Post AoU-ish and will include New Avengers. Always Romanogers/ Captasha/ Stevetasha/ StevexNatasha/ CaptainWidow but will mention friends and other couples- no hate. A bit of fluff, a bit of smut, a bit of mild angst, a bit of everything.
Status: Last updated Oct 26, 2016
My Reaction: These one-shots are super cute and super funny. I think that I came back to these every few weeks just to re-read them. I think they are very good tbh. You should definitely check them out. Very well written.
Best Chapter: My Best Friends Romance- This is a super cute chapter of Bucky and Wanda spying on Natasha and Steve, which ultimately lands them in a bit of trouble. Super cute and funny TBh

#4 Fanfiction.net

Title: You and I
Author: Natascha Romanoff
Chapters: 97
Views: 324k+
Summary: A collection of Romanogers one-shots
Status: Last updated August 21, 2019
My reaction: These are by far one of the best one-shot collections out there. Literally Natascha Romanoff is amazing and her stories are always so good, she has a way of getting people connected and intrigued, just fabulous. Grammar and spelling is good, and just all-around amazing.
Best Chapter: Do You have a Girlfriend? This chapter is basically about Lila and Natasha going shopping and they meet Steve at the grocery store. Both are immediately drawn to each other but don't take each other's number. This story is like fate, it's so cute and really funny. Also, check out A murder mystery! It's so good!!!!!!!!

#3 Wattpad

Title: To find A love: Romanogers One-shots
Author: shewritesall
Chapters: 49
Views: 113K
Summary: A series of Romanogers One-shots
Status: Last updated March 19, 2020
My Reaction: These are really well-written one-shots, and never fail to impress. The stories she thinks of really good, I don't know how she thinks of these things! It's honestly so good. Each story is so well thought out.
Best Chapter: A Criminal Affair: This is a mafia, Romanogers Au. I really enjoyed this chapter because you see a darker side to Steve, and Natasha seems so comfortable in this. You don't see Steve act so dark in a lot of things so it was so refreshing to see that.

#2 Wattpad
Title: Romanogers Oneshots
Author:  TheCaptainsSwan
Chapters: 169
Views: 238K
Summary: Steve Rogers and Natasha Romanoff One-Shots to hopefully ease the pain of endgame
Status: Updated March 19, 2020
My Reaction: This is the longest one-shot book I have ever seen. The author of this one is so freaking creative. They write really sad one-shots and then writes really happy ones, I think a lot of the authors writing is a mix of bittersweet happiness. Towards the latest updates the chapter get very funny, I like the mix in the writing. The author takes requests very often and I think that's great, you know that they care about their reader.  
Best Chapter: You look Patriotic: This one is HILARIOUS and sweet. This one involves a picture of Natasha in a Captain America outfit, this happened way before she even met Steve, so you get to read about everything how far Natasha attempts to find the photo.

#1 Wattpad
Title: Romanogers Oneshots
Author: crystalitexx
Chapters: 42
Views: 33.6K
Summary: 》 some one-shots of the soldier & the spy》 filled with angst, fluff and everything in betweenStatus: Updated Jan 01, 2020 My Reaction: I don't you can go wrong with these one-shots, they all have something that draws you in. The author is great at writing and has great grammar. The ranger of these one-shots is great! Some deal with missions, to everyday events. You even get to see the really competitive side of their relationship. This is great and a good dose of Romanogers. Best Chapter: Jealousy: I don't know about you but I love seeing Natasha all protective over her man, this one-shot focuses on someone flirting with Steve and Natasha getting a tad bit upset over it. Steve likes to tease Natasha about it, but Natasha is not letting him off the hook that easily. So go check out that one!!!

As always go show some love to these authors who work really hard! It's so worth it! Also please let me know if these recommendations are good, or if the book is just not that helpful.