premade ships

I think Penny Pizzazz and Salim Benali make a cute couple.

Candy Behr and Joaquin Le Chien.

Yuki Behr and Alexander Goth :)

Caleb and Johnny has stolen my heart from my main save (I dub them 'Vest'), although Caleb and Morgyn is definitely on the up and up. I may have to go the OT3 route. Ulrike and Maaike are married. The Partihaus is an OT4 (I did de-age Marcus back down to YA, though). Diego and Izzy are an amazing power couple (their household name is 'Fabulobo'). Liberty and Summer, much to Travis' relief. Luna and Sofia has definite possibilities for mutual crushing cuteness!

Caleb and Inna Cents from maxis gallery, also Caleb and Morgyn nowadays!

Married couple OTPs currently in my game:
Dina Caliente and Johnny Zest
Jade Rosa and Eva Capricciosa
Candy Behr and Mitchell Kalani
Penny Pizzazz and Marcus Flex
Malcolm Landgraab and Diego Lobo

Weird OT3 situation where the third one had a child with someone and then never left:
Maaike Haas, Ulrike Faust and Gavin Richards

When Sims 4 was announced, the first trailer was a mix of live action + CGI showing a group of sims interacting with real humans. Those were the first official Sims 4 sims we have notice: Babs L'Amour, Raj Khemlani, Johnson Ready, Olivia Stewart, Moose Dubros and Kalista Kalid. I played a lot with them. So, I'm going to list here which partner I gave to them and still think is a good match.
https://simscommunity.info/wp-content/uploads/2014/10/Capture9.png

- Olivia Stewart + Moose Dubros (this couple happen'd in an early save file of mine, which i still ship to this day):
https://vignette.wikia.nocookie.net/sims/images/7/75/Olivia_Stewart.png/revision/latest/scale-to-width-down/250?cb=20181127010318
https://vignette.wikia.nocookie.net/sims/images/5/5e/Moose_Dubros.png/revision/latest/scale-to-width-down/250?cb=20181127011805

- Poppy Boyd + Johnson Ready (both of them have the gregarious and the non-commital traits, which for me makes them a good pairing):
https://vignette.wikia.nocookie.net/sims/images/a/af/Poppy_Boyd.png/revision/latest?cb=20190310193550
https://vignette.wikia.nocookie.net/sims/images/6/60/Johnson_Ready.png/revision/latest/scale-to-width-down/250?cb=20181127013011

- Dana Adler + Kalista Khalid (In my save Raj Khemlani was her boyfriend , but he was having an affair with Babs L'Amour, then after she caught the two cheating she moved out of the Arrival Household. Then i thought she deserved someone that also wanted a soulmate as an aspiration. Dana has the soulmate aspiration + she's good and would never hurt Kalista feelings):
https://vignette.wikia.nocookie.net/sims/images/0/0d/Dana_Adler.png/revision/latest/scale-to-width-down/250?cb=20181201221945
https://vignette.wikia.nocookie.net/sims/images/3/31/Kalista_Kalid.png/revision/latest/scale-to-width-down/250?cb=20181127005548

- Babs L'Amour + Ollie Purdue (after having an affair with Raj and a lot of other guys, she finally met her man Ollie. They married, had 2 girls and a boy, and are living happily ever after):
https://vignette.wikia.nocookie.net/sims/images/8/81/Babs_L%27Amour_headshot.png/revision/latest/scale-to-width-down/250?cb=20180518134022
https://vignette.wikia.nocookie.net/sims/images/d/df/Ollie_Purdue_headshot.png/revision/latest/scale-to-width-down/250?cb=20180518132938

- Summer Holiday + Raj Khemlani (after cheating on Kalista, Raj suffered a lot of karma before meeting the pretty Summer Holiday):
https://vignette.wikia.nocookie.net/sims/images/8/84/Summer_Holiday_headshot.png/revision/latest/scale-to-width-down/250?cb=20171206194438
https://vignette.wikia.nocookie.net/sims/images/8/85/Raj_Khemlani.png/revision/latest/scale-to-width-down/250?cb=20181127011124

BONUS:
- Armand DiAggro + Bjorn Tu'Rock (Right after Kalista dumped Raj, he and Babs started dating. Karma sometimes is slow, but doesn't fail. In this case it wasnt even slow. Couple of days dating, Raj decided to propose to Babs, which refused and broke up with him. Why? She was dating another guy named Bjorn Tu'Rock and had no intentions of setling down with no one. Karma is not thunder, and it strikes twice. When Babs thought she was starting to fall in love with Bjorn, he met his true love Armand, leaving her heartbroken before she met Ollie):
https://vignette.wikia.nocookie.net/sims/images/2/2f/Armand_DiAggro.png/revision/latest/scale-to-width-down/250?cb=20190223204735
https://vignette.wikia.nocookie.net/sims/images/d/dc/Bjorn_Tu%27Rock.png/revision/latest/scale-to-width-down/250?cb=20181205220247

- Liberty Lee + Travis Scott (Thats why Summer Holiday got in a relationship with Raj. Both her and Liberty had a crush on Travis, but her job schedule never left any time for her to try to get into Travis heart, so Liberty won the race of love):
https://vignette.wikia.nocookie.net/sims/images/6/6a/Liberty_Lee_headshot.png/revision/latest/scale-to-width-down/250?cb=20171206194553
https://vignette.wikia.nocookie.net/sims/images/9/97/Travis_Scott_headshot.png/revision/latest/scale-to-width-down/250?cb=20171206194512

None of my premades have ever gotten together with each other.

Sergio Romeo and Gunther Munch.
Sergio and Gunther hated each other on my game at first, but it wasn't really hate, it was just Sergio being mean to Gunther because he was trying to fight against his true feelings. He eventually came out of the closet and ended his relationship with Siobhan Fyres. Now he's engaged with Gunther.

Sergio and Joaquin married in one of my saves. Sergio is usally miserable but he was cheerful and even enjoyed his kids in that save.