You can't weigh 270 pounds for any position in soccer because of all the running, as far as I can tell; maybe GK but even that's a real stretch.
I don't think Lebron was ever 270. There was a point early in the 08/09 season when he was absolutely JACKED and was heavier then we've ever seen him and he was probably hovering around 260. If he were a footballer and match fit, I'd guess his playing weight would be around 235-240
I'm curious as to any current players who in that weight class. That's OK for Rugby Union, but soccer?
Jan Koller's listed weights ranged from about 220 to 235 lbs. Other than him, maybe a few goalkeepers might be that weight. Zach Thornton has been listed as high as 230. But I think Jan Koller is really the exception that proves the rule. He was able to compete at all because he was exceptionally agile for his size - and even then he sometimes looked awkward on the pitch. Had LeBron James played only soccer for his whole life, he'd probably be very similar to Koller.
Remember he's also 6'8," he could easily drop to that weight and maintain or even lower his body fat %. How much does Llorente weigh? He's got to be + 200lbs