OLED is very different technology than LED TVs. OLED panels have infinite contrast ratios so blacks are perfectly black. If you are a movie/video buff, and you can enjoy your TV in a darkened room, then OLED is hands down the way to go. Particularly since the price gap is now so narrow between the best TVs in each category. There is a small chance of screen burn-in with OLED panels which is not a risk with LED TVs. However, Rtings.com ran some long term scenarios and concluded that burn-in for the average user is not a concern as long as you're not constantly watching something with static images.
LED panels are brighter and good ones can still be had for less than the cost of an OLED TV, so if you mostly watch video or streaming content in a room with windows and sunlight, then your best bet is probably one of the better (brighter) LED TVs. FWIW I have not made up my mind yet. A really good Samsung QLED is about 1/3 less than the LG OLED. Luckily enough for me, I'm in no hurry and TVs seem to get cheaper all of the time