I am not so sure that if Heck is the one drawing all those iconic stories that he doesn't get a lot of the love Romtia Sr. is getting. Pretty sure he would get a pretty big chunk of it. The vast majority of Romita's cache is that he was the Spider-Man artist during that run. He was not the plotter or writer that Ditko was, though.
He's the Roger Moore of Spider-Man artists. Reliable; did a great job with the character; perfectly suited to the times. He had a nice long run on some memorable storylines. Some people, who grew up on him, even like him better than the original guy (or anyone else). But, objectively, he's not anywhere as good as the original guy, who set the standard.
That would make McFarlane, I guess, the Daniel Craig of Spider-Man artists.