Top Gedolim That Wear/Wore Radzyner Techeiles

Image from mishkan-hatchelet.co.il.

• The Rebbe, Maharsham of Berzan
  He wanted to be buried with the techeiles.
  
• R’ Itizkel Ponovitcher
• R’ Chaim Ozer Rudzhinsky
  He supposedly wore it on his tallis katan
• R’ Chaim Berlin (possibly)
  R’ Akiva Yosef Shlessinger
• Rabbi Yitzchok Noson Nochum Englard – Rav, Beis Medrash Radzin

Those that didn’t wear it but supported it

• R’ Shmuel Salant
• R’ Yehoshua Leib Diskin
• R’ Yehuda Leib Eiger

Sources:

• http://mimaayanhashiloach.blogspot.com/2009/
• http://doseofhalacha.blogspot.com/2013/02/a-colourful-debate.html
• Maharsham will: http://www.hebrewbooks.org/pdfpager.aspx?req=35914&st=&pgnum=9
• https://judaism.stackexchange.com/questions/12979/list-of-techelet-wearers/13027#13027