Chandler has a lot of pretty good Asian/ethnic food. Everyone else already listed all the higher-end dining options for the most part, so I will give some places that are low-mid range everyday style eats.
Dhaba: Best Punjabi food that I’ve found in the Metro area. Highly recommend the goat curry, any naan, butter chicken/tikka masala, and a solid tandoori chicken.
Sizzle: Old town Scottsdale so a bit further, but probably the best KBBQ in AZ in terms of quality of meats and authenticity. Great combos, highly recommend any of the marinated beef options (I really like the seasoned short ribs).
Old Town Taste: Pretty authentic Sichuan food, I know the owner personally as well. They have a solid white-washed menu, but the best stuff are the authentic water-boiled fish, szechwan fried fish fillets, stir fried green beans, and dry pot. Great seasoning and spice.
Glai Baan: Modern-style Thai street food, across the street from Binkley’s. Pretty popular these days and the food is solid! Skewers, Thai BBQ chicken, they got it all.
Bianco’s: Been eating there since I was a kid growing up, if you need to know more, watch the Chef’s Table episode about him. Great guy, and he is probably the reason why I don’t eat pizza outside of Arizona (and I’ve tried many LA/NYC places).
Hodori: Comfort-style traditional Korean food in Chandler, close to the H-Mart area. Good soondubus, bulgogi, spicy pork, soups and stews. It’s been around since the old Asiana market and lasted even after H-Mart opening.
Belly Kitchen and Bar: I believe they just opened up their second location over in Chandler. Original spot opened up close to me in Downtown Phoenix, really good modern Vietnamese/Asian food. Chef was inspired by Slanted Door and his execution is solid for a fusion type deal. Highly recommend the Crab Banh Xeo (crispy crepe) and their fried chicken. The pho is okay, there are better places… see next
Pho Thuan Thanh: This is going to be the best hole in the wall pho in Chandler/Mesa. Run by the same family that runs Pho Thanh and Da Vang in Phoenix (which are the best pho places, but Pho Thuan Thanh is closest to you).
Harumi Sushi: There is one in downtown Chandler, it is a solid roll joint. They use purple rice as their catch.
Little Miss BBQ: This one is over in Tempe, but one of the better BBQ joints in Arizona that isn’t a major chain export. They specialize in Texas style BBQ, but they sell out fast and you will have to get there early to grab brisket, burnt ends, etc.
Happy Bao: Located in Mekong Plaza in Mesa, they have some of the best buns/baos in Phoenix. Definitely recommend any of their dumplings and soup dumplings. Their other stuff is okay.
If you like ramen, most ramen places in Arizona fall short in my opinion. I have a higher bar than most, but just don’t go to Republic Ramen in Tempe - they are expensive and their ramen is not authentic and tasteless. Jin Ramen is better in Chandler, they are an export from a LA ramen chain.
That’s all I have off the top my head for the Chandler/Mesa/Tempe area. Most of these come from when I lived around there for 6 years. Ethnic food is definitely the forte of the tri-city area. I would say Mexican food is better in actual Phoenix/West Phoenix (Taco Chiwas is my favorite taco shop) and for high end you’re generally better off going to Scottsdale (and of course Kai down there). Binkley’s as others have mentioned is great - the chef there trained at The French Laundry along with Alinea’s chef. Always a fun meal there.
Edit: Adding a couple more!
Virtu Honest Craft: Modern Mediterranean, very solid and their menu generally rotates, located in Old Town Scottsdale near Monarch Cafe.
Francine: Mediterranean Southern French bistro dining. Wine list is not the easiest to navigate and pretty heavily marked up ($250 for Yellow Label Veuve), but the food is pretty good. Highly recommend the seafood uni pasta, moules-frites, and most of their protein entrees.