I was amazed by the way they portrayed the very first set of Elite Four. I liked the way Mato drew Lance, he looked awesome. Though they were villains, they are probably the set of E4 which had the most limelight =D
Hahaha, in fact I believe the main reason they had that limelight was because they were villains. =D The main villains are always going to be the main focus 'til they're beaten, hahaha. I do agree that I really liked it as well. ^^ To be honest, I've been impressed with how Kusaka has portrayed the Elite Four every time.
In Yellow, he was very creative and decided to make them evil (with the RBGY game sprites you can't really blame him, haha) which was a neat twist and actually made a lot of sense. Most people in power tend to be corrupt anyway, and it was interesting how he made them think they were doing good instead of evil, almost making them like anti-hero characters.
In Gold/Silver/Crystal, there was no Elite Four. But he still managed to do interesting things with them, such as making Karen and Will actually be Masked Children and be connected to Blue (female) and Silver; and made Koga and Bruno reform for their evil ways and actually help Red and Green (guy) out. Then best of all I love how he had them to meet at the end of GSC and had them talk about joining together, to foreshadow them becoming the Elite Four. (and in HGSS, we find out that they became the new official Elite Four of Johto)
In Ruby/Sapphire, although the Elite Four didn't do much, they still seemed impressive. They all had a lot of character about them, and even though they were all good he decided to focus more on the "power" aspect of them. He made them all be able to get and
control the three Hoenn Regis, and they were even able to use the power from them to prevent the entire region from being destroyed.
And although we haven't seen the Sinnoh and Unova Elite Four yet, I'm sure we will soon enough. (with Sinnoh we may see them at the end of DP next volume with Sird appearing, or at the very latest sometime in Platinum) And I can't wait to see what he'll do with them this time around... Especially Unova's, because with Black wanting to challenge the League/Elite Four/Champion, it means he'll not only battle them but they'll probably be pretty important and may even get their own arc (or mini arc in one of the Unova arcs) like with Yellow. Granted they play their cards right Unova's could be the best ones yet. ^^