Aaroniero was the only arrancarized menos, but not sure if Grimmjow was arrancarized by the hogyoku..can't really remember. However, Starrk and Lilynete were naturals, as well as Nnoitra, Neliel, and Szayel at least, since we saw them as arrancar (in flashbacks) before Aizen had the hogyoku.
Oops, I totally forgot about them.
Another thought I just had was the way Ulquiorra and Ichigo transformed.
Ulquiorra's resurrection had reiatsu enveloping his whole body just like other espada, same with Ichigo.
I know that normally Ichigo has it surround him when he hollowfies, but it happened without the use of his hand to create a mask. And it was different from his other monster hollow transformation because we didn't see bits and pieces of his mask forming on his face. Not to mention the physical change throughout his whole body.
I dunno, maybe I'm wrong.
Well, I think it was done on purpose with H1 Ichigo, to show the process in slow motion. I guess you can say H2 Ichigo form look more perfected probably due to Shirosaki growing stronger in HM just like Chad did with his new power-up.
I wonder during the process is it Shirosaki that takes over forming a physical manifestation while Ichigo becomes temporarily trapped inside his inner world, like a reversal switch?