It can be useful to look into Kenneth Frampton's "Towards a Critical Regionalism: Six points for an architecture of resistance".
Regionalism (critical regionalism) as far as I know is not so much a post-modern term but a modernist one - part of the discussion whether modernism should be 'the international style' or whether locality should play a role. Most important in this movement was Alvar Aalto, but our friend Wikipedia comes with this list of names:
"In addition to Aalto and Utzon, the following architects have used Critical Regionalism (in the Frampton sense) in their work: Studio Granda, Mario Botta, B. V. Doshi, Charles Correa, Alvaro Siza, Jorge Ferreira Chaves, Rafael Moneo, Geoffrey Bawa, Raj Rewal, Tadao Ando, Mack Scogin / Merrill Elam, Glenn Murcutt, Ken Yeang, William S.W. Lim, Tay Kheng Soon, Juhani Pallasmaa, Juha Leiviskä, Tan Hock Beng. Dimitris & Suzana Antonakakis are the two Greek architects for whom the term was used by Tzonis and Lefaivre."
Also the South American modernists could be called regionalist - it's the 'tropical modernism' (Lina Bo Bardi, Louis Baragan, ...)
When in post-modernism 'region' starts playing a role as a symbolic layer you get this very literal translations - which is very flat and really not something you'd want to use as a reference. Much more interesting I think is something like Renzo Piano's Marie Tjibaou Cultural Center - which really is a representation (or continuation) of a culture, not some easy image pasted on a building.
In contemporary architecture, perhaps Kolhoff's brick skyscraper in Berlin or Christian Rapp's centre of Ypenburg could be. Definitely Sjoerd Soeters' urban plan for Java/KNSM island is regionalist.
But I don't know specifically about skyscrapers. It's in extreme a typology that is built in the same corporate architecture around the world. And when it incorporates local elements or traditions, i'm not really sure we're still talking architecture. The Taipei 101 for example is said to represent a bamboo or a palmtree or something terrible like this.