In architecture, it's pretty difficult to reach that iconic status of:-
(i) becoming a recognised "name" architect,
(ii) having a recognized style that is more than just redesigning the same building again and again
(iii) deserving your fame with good, attractive, functional buildings
I don't follow the architectural press enough to know who, in the industry, is in fashion or not, but I have noticed the Swiss combo of Herzog & deMeuron. They may not tick all three items on the list above, but they've come up with some cool designs.
Concert hall, Hamburg:-

a) as seen from the deck of my yacht, b) up close and personal:-
House inspired by the work of our very own Plankton:-
.....
Shantu Uni Medical College, China:-
.....
Art Gallery in Vancouver:-