For once, we agree, I would never want LeBron on this team. I do think he has used PEDs. But I dislike him more for the egocentric personality and penchant for drama.
I have no idea if Lebron used PEDs and there's no proof that he did.
Same and agreed.
I did see him play before he was drafted and he was a huge man-child back then. So if he was using, he must have been also using back then because he hasn't dramatically changed his body shape versus other athletes.
Disagree:

We do not see similar before/after pictures for physical specimens like Karl Malone. Here is Karl at Louisiana Tech:

...shakes head...
Lebron was 18 when he was drafted. Malone in that picture is 21. There's generally a huge difference between those ages in muscle development. If you're going to do a comparison, make sure the guys are comparable ages.
This is Lebron when he was still 17 -
http://www.hoopsvibe.com/images/stories/Lebron%20high%20school%205.png. He's huge for that age. There's absolutely nothing abnormal about his adding muscle mass in his 20s and 30s. In fact, it would be exceptionally surprising if he didn't. Heck, Jae Crowder as more muscle development since high school than Lebron does. I don't hear anyone here accusing him of doping.
When there's a shred of evidence then feel free to accuse someone. Until then, be better than that.