Dear Gaurav,
in my last couple of Customer Projects I choosed different ways to meet the customer requirements. For small changes I made enhancements on the SAP Standard Feeder classes, for bigger changes I created my own Feeder classes with my own Floorplan Manager Configurations.
As the hole application is created with FPM there is no specific Web Dynpro Component. In the top part of the application the FPM Component FPM_SEARCH_UIBB is used for the search criterieas, in the lower part the FPM Component FPM_LIST_UIBB_ATS is used for the list Output. Each FPM implementation has it's own Feeder class. Also look at the Screen-shot I included.
Hope this helps.
Tobias