To be technical about it (because I usually am), all the statues in this line have been slightly larger than 1:5. It's been closer to 1:4.5. In 1:5 scale, statue Faith and Willow, who are about 14.5" tall, would translate to be over 6 feet tall in 1:1.
If the statues were true 1:5 scale and accurate to the height of the actors who portrayed them, Angel would be a little over 14.5" and Faith and Willow would be 12.8", excuse my mixing imperial and metric. In this larger than 1:5 scale, Angel should be close to 2" taller than Faith or Willow. It's impossible to judge without taking a photo with the sightline level and the camera perpindicular to the center statue, or absent a ruler, but I am annoyingly impatient and can't wait to get Angel myself to stop speculating. So, it still appears to be a combination of Faith and Willow being too tall and Angel being too short (and Buffy and Spike fudgeable due to them being folded up).
Is this an academic argument? Quite possibly so, but I would also make the case that the overall petite stature of the BTVS actresses, particularly Buffy, was thematically and artistically important to a show about unassuming super-chicks. The physical contrast between Angel and Buffy emphasized the irony that Buffy was physically stronger than Angel.
None of that is apparent from these statues, particularly the female characters, but I get it that that's not the point of having statues meant solely for display. They are cool to look at, but are not really faithful to the shows when you dig deeper. It still irks me that they botched Willow so badly on so many levels (artistic, thematic, execution), and Buffy not that great, either. But they did recover with the last three, particularly Spike.
Although IMO Spike-Angel-Faith in that order seem more successfully executed because they are closer to their characters as depicted in the shows/canon, the point is to look cool, which is why a Xander or Giles statue will never be made, specifically, and why more generally BTVS and ATS, aside from Illyria and some of the Big Bads, are dead end properties for a company like Sideshow and today's market for leisure items.