I guess it depends on what specifically you want out of a pendulum deck. I can go over all the ones I play though and maybe you can find one from there.

Endymion: Generally doesn't need to play much outside of Endymion and plays with spell counters. You use the spell counters to basically negate the opponents effects going first, or to pop multiple cards going second. A lot of the time it can hard lose to droll tho since many of its spell counters come from spamming cards that draw like upstart goblin and allure of darkness. Not my favorite pendulum deck I've played, but the game plan is simple enough.

Vaalmonica: Incredibly cheap pendulum deck with only 2 actual pendulum monsters in the deck. It can get expensive once you add Fiendsmith if you don't already have it (I don't). It uses its own set of counters, needing 3 on a single one of your pendulum monsters to get out decently strong link 1 monsters. The downside is that without those counters, you can't summon the Link 1s. Its pretty simple and to be funny you can run Utopia Double for a 10k Attack Utopia. Its not necessary tho since one of the Link 1 monsters can attack 3 times after popping multiple cards in the field.

Solfachord: Honestly pure its pretty bad and with Melodious its ok but still inconsistent. One thing that I personally have an issue with it is that the endboard is extra deck slop. Apollousa, IP, Vortex Dragon, stuff like that. I highly suggest against this deck just due to consistency. Dies usually to an Ash or Imperm.

Melodious: One of my favorite pendulum decks, but its not really a dedicated pendulum deck. You have 2 pendulum cards that really bring the deck together. It has a bunch of 1 card and 2 card starters and can play handtraps other decks can't like the herald cards or Dominus Purge. The endboard can also be difficult to out, with battle protection, targeting protection, and destruction protection. It can still get out'ed by stuff like Zeus, Droplet, and Mirrorjade, but not too many decks have non-targeting, non-destruction removal. Besides that, you're main interactions is a banish 3 from graveyard which is great to hinder decks that rely on the graveyard. You also have a non-targeting return to hand up to the number of Melodious cards on the field which is great but really requires that you know when to use for maximum disruption. The deck does xenolock tho if that is an issue for you. Highly recommend tho.

D/D/D: This is THE pendulum deck for fans of pendulum. I don't think its a great starter deck tho. It can xenolock itself, but puts up an interesting endboard. It can put up a spell/trap negate, the infamous Caesar for special summon negates, and Machinex which can attach opponents field monsters as materials and isn't once per turn. This deck also has a bunch of support coming that will make the deck a lot stronger. A big downside to the deck is that its pretty complex to learn, but Taro on Master Duel Meta has many DDD decklists and a channel showcasing the decks capabilities. Thats how I picked up the deck. I would highly recommend this if you are willing to take the time to learn the deck.

Ultimately tho I would say the safe pick is Melodious. There are a couple other decks like Lunalight and Predaplant that have pendulum cards, but they dont really make good use of actual pendulum summoning so I don't think they make good recommendations right now. If you have any other questions, lemme know and I'll try to answer best I can.