I think you mean "more talent" not "all the talent" -- if the other sibling had no talent at all, they wouldn't still be skating at junior/senior level.
Exactly! Carly Gold qualified for Midwestern Sectionals in Junior Ladies this past season, so she is very accomplished in her own right (triple Lutz is a new jump in her repertoire this season). Gracie and Carly Gold are fraternal twins, as are Alissa and Amber Czisny. I really enjoyed watching Amber's powerful style of skating and she could spin very well in both directions! Amber competed in one senior US Nationals and one senior international before she retired, and I would call that a successful competitive career.
Current Team USA athletes with skating siblings:
The Lorello family has 4 ice dance siblings - Ian Lorello has competed senior nationally & internationally; his older brother Alex has competed senior nationally, and the 2 younger twin siblings, Grant (7th) and Meara (6th), competed with different partners at 2012 Novice Nationals;
Caydee and Haven Denney are the current U.S. Senior and Junior Pair champions, respectively, with their partners;
Rockne (pairs) and Collin (ice dance) Brubaker have both competed senior nationally & internationally;
Molly, Max, and Madeline Aaron have all competed internationally - Molly in Senior Pairs (now retired), Max in Senior Men, and Madeline in Junior Pairs.
Mariah Bell (5th in Junior Ladies at 2012 US Nationals) has an older sister, Morgan, who competed in the Senior Ladies event at 2011 and 2012 Nationals;
ETA: Isabella and Anastasia Cannuscio have competed senior nationally & internationally in ice dance with their respective partners;
Vanessa Lam, Kiri Baga, and Yasmin Siraj have older sisters (Nina, Courtney, and Layla), who competed at the senior level in the US;
Tiffany Vise's younger sister, Brittany (now retired), competed pairs nationally (senior) and internationally at the junior level.