Sure, although I brought up the whole attraction and area when I said it was dull, so if "incredibly themed" you mean ignoring everything other than constant Disney style decoration around the track then no. But now that would be picking things apart and anaylsing. As a decent themed coaster where it actaully adds something to the experience, there are far better even in the same park.
Nemesis —The quarry setting is incredible and is what creates half the fun, all of which had to be created for the ride as we all know. You get right down into it, explore over and under the ride before youre even at the station. The waterfalls and the ride over pools, the music, it all comes together for a really exciting ride. Hey it even has some junkyard theming but actually adds some style, not just token vehicles parked on flat ground. Nemesis' landscaping beats The Swarm's car park-coaster style by miles. Eve just looking at it, the ride is an impressive picture.
Nemesis Inferno—Simple but good, you queue around some jungle planting then up into a volcano. It sets you up well for the ride. Starting the station at high level then immediately into the tunnel is a great kick off to the ride, really pacey. The interaction with the surrounding paths is great. Very different to The Swarm's pretty piecemeal, empty plaza.
Colossus—Well, it used to be much better when it was half over the water, and the station is very cheap. But the bridges over the ride mix things up and hide how formulaic the layout actually is, adds some fun interaction. The planting, music and waterfront queue was originally very good. Felt much more substantial than the Swarm ever did.
Black Mamba—A real labyrinth of the coaster through the landscape, buildings, paths. The queue deeper into the village and into the cave is a brilliant set up, keeping a lot of the ride quite secret. Incredibly detailed too. Brilliant moment starting and finishing in complete darkness, very memorable.
Taron—Whoever says the theme is dull must be one incredbly jaded enthusist! If we're talking about The Swarm being "good enough for the public" then are we really suggesting the same public would shrug their shoulders walking around Taron?
Wicker Man—Miles better, has a lot more character than Swarm, the area is a lot more interactive, the coaster is quite thrilling and fast. Ironically many enthusiasts who love The Swarm scorn Wicker Man for being a pretty average GCI (fair enough, but its still lots of fun) despite the public clearly loving Wicker Man and the theme.
Raptor Attack—Yes its a dead simple coaster but I actaully think its more fun and the trail down to the ride is a whole lot more creative than The Swarm's pavement.
Baron—Probably the only one on this list where the coaster alone is same as Swarm for me, but the brilliant theme is what makes the difference. Cool preshow, simple and good, great station setting, adds a lot to the ride.