Frame recommendations for aggresive trail/enduro ?

I want to build a bike, so im looking for a used frame. I want a hardtail frame for 26-27.5 wheels that will be durable enough for more aggresive trail. Can you please reccomend me some bike models / frames i can look for used? (Please reccomend me more or less famous brands, cause it's hard to find something more rare where i live - like norco, kona, gt, etc.) Im ok with the older models. Thank you in advance!