Some brands based on feedback. Depends on your budget

Okamura (xtra furniture Gardens)
- Contessa 4k++

Herman Miller (Some forumers says Gardens got)
Aeron - 6k++
Embody - 9k++

Ergohuman Mesh(Am-office) - 2k++

IOO Mesh Chair (Delta office) - not sure price. expect less than 2k

Steelcase (contact KL steelcase, should be in Gardens)
- Think - 1.3k++
- Leap - 2.6k++
Steelcase carries a big range of cheap to expensive chairs. You can look for their catalogue.
My office has a bunch of Let's B chairs, probably under 1k. They are pretty decent if your budget is tight.

Haworth (Somewhere near plaza lolyat). Got comments in reddit says Haworth have bad reliability
- Zody - ??
- Look - ?? (this is the chair that I sit on in office. It has more features, but I feel that the Let's B is slightly better)
Lower end, go get Ikea Markus
Cheapest - get kopitiam plastic chair

Others I might left out.
Things to note:

Chairs are mechanical things. So its best if it is good warranty, as mechanical parts can wear out.