If you love infinite contrast and don't have lot of cable TV use and have a moderately dark room setup - OLED is for you. The PQ is good and you'll go gaga about its perfect blacks. So much so that your love for OLEDs will make you swear for it and rest every other TV will look like burden on earth.
If you want to use your TV like other mortal humans, in a living or drawing room, with a mix usage of everything and don't pixel peep looking for that perfect blacks, you will live happily with QLED or high end LED and save few bucks vs OLEDs.
I am on the second boat myself. I look for large viewing experience than an infinite contrast experience. Colors, motion and ease of use is lot more important than a great black sky. I tried budget LED brands from TCL, VU and Mi. I am very happy with those. All three of them are comparable to each other in PQ. TCL and VU have a QLED option, I haven't demoed them.
Just adding that OLED isn't just about perfect blacks. It also has the best viewing angles. Only IPS can compete with it, but IPS has really bad contrast. VA panels have better native contrast but with bad viewing angles, so much so that on large TVs, even if you sit in the center, the corners will be darker and colors will shift. A few high-end models come with wide angle filters, but those also smudge a few details, leading to loss in sharpness and lower effective resolution. Will everyone notice it? No idea. I do, but I'm a video editor. I do. My parents couldn't care less about it. They just know OLED looks better.
QLED is just normal LED LCD panels with quantum dot filters. Sony Triluminos is also technically QLED. So are some LG sets. QLED itself doesn't mean much than slightly better color gamut in case of lower end panels. That's it. Samsung QLEDs are VA panels. Sony has a mix of IPS and VA. LG is all IPS now for LEDs.
Now for SDR, VA panels will offer a decent experience as long as you view mostly from center. For HDR, you need at least full-array local dimming. Otherwise the blacks rise a lot. This one reason why TVs without local dimming or edge-lit dimming with low zones don't go above 400-500 nits, even Samsung Q60. This also one reason why many report that HDR looks washed out and SDR looks better. That's a combination of tone mapping for a lower nit display and then raised blacks.
If you want a good HDR experience, FALD is the minimum that you should look at. We don't have budget FALD sets currently by TCL or Hisense, unlike abroad, so your starting options are limited to Q70 or X950G, which are overpriced in India and are priced too close to LG B9.
Now for burn-in, I won't type again, just go through my previous posts. Commented multiple times on the forum. Easy to search. Basically, if you're cable viewing time is limited to 2-3 hours each day, get the OLED. The new panels will be fine for 6-7 years. For reasoning, just search by my name and burn-in.