Asking which sequencer is best is like asking what beer is the best. Now... if you're looking to get intoxicated... well beer is beer. If you're all about the journey to inebriation... you can branch off into sub-category after sub-category and still not cover them all.
Buy a small, inexpensive sequencer or module with sequencing built into it. Chances are you'll probably keep it around... since most sequencers can be clocked externally and synced to another sequencer... and sequencers can do a lot more than trigger notes.
As you build up some proficiency with your inexpensive, "simple" sequencer you'll start to develop a taste for what you like about it and what you don't. You could even buy two different types of inexpensive sequencers and see how you get on with them. Once you have some wiggle time under your belt, you'll probably feel more confident about selecting a larger sequencer.
I'm not recommending modules here but telling you about my own experience.
I started with an Ornaments and Crime module paired with a Temps Utile. I could get a fair bit done between the two modules.
I then bought a Pittsburgh Modular Micro Sequence. It looks pretty simple at first glance... but accessing features using long and short button presses and remembering which and what blinking light means what was infuriating. I pulled it from the rack in anger.
I bought a 1010 Music Toolbox because of the screen. I use it a lot but it isn't something I'd want to structure an entire song on. But it's really flexible and offers quite a few neat features like recording CV and audio (in a limited way). I also bought a Mimetic Digitalis from Noise Engineering around the same time. The Mimetic does almost everything the Micro Sequence can do and more.
I'm considering a Westlicht Performer... however they have to be built as they can't be bought retail. It's similar to the Eloquencer... which is something I thought about getting.
My recommendation is start small with the sequencer and don't be afraid of using small ones sync'ed together rather than trying to find a large one that does everything in multiples. You can never have enough VCAs... and you can never have too many sequencers. Also... anything that wasn't pulled from the rack in anger has an easy to manage interface. That's also a requirement for me as well.