As per being under taqleed of Ayatollah Sistani, while performing wuzu and wiping the feet, is it compulsory to wipe till the ankle(joint) ? If yes, then.. Are there any other Marja who says it is not compulsory?

Yes according to Ayatollah Sistani and all the other maraje it must be up to the ankle joint as the verse of Quran states (Surah 5 verse 6)