Ship Making

Okay so on fanfiction.net I'm making a history book to go with two major story lines I've come up with.
(I'll add the stories here later)

I'm having trouble deciding on couples though.
Here are the ones I know I want to keep as couples:

Twilight x Flash Sentry
Rainbow Dash x Soarin
Fluttershy x Big Macintosh
Pinkie Pie x Cheese Sandwich
Celestia x Discord
Cadance x shining Armor
Nurse Redheart x Donut Joe
Derpy x Doctor Whooves

Here are the ones I'm thinking about keeping, but I'm okay with changing:

Applejack x Caramel
Rarity x Thunderlane
Luna x OC (my oc Dream Shield)
Scootaloo x Button Mash
Sweetie Belle x Spike
Applebloom x Rumble
Babs Seed x Pipsqueak
Featherweight x Twist
Cherry Jubilee x Braeburn

I'm also trying to find pairings for Cheerilee and Zecora. So far I've come up with this:

Cheerilee x Trouble Shoes
Cheerilee x Apple Bottoms
Cheerilee x Bill Neigh
Cheerilee x OC (Mine or Other's)

Zecora x OC (Mine or Other's)
Zecora x (unnamed pony)

Can anyone help me with this? Please & Thank you.