Sorry but I would say probably not. How about a different "type" of goldfish? Fancy with long fins or those ones at the
LFS that look like their eyes are bulging out? I have 3 goldfish and have tried other fish and they all die when they were with the goldfish. Part of the reason is goldfish like is cooler and don't mix with tropicals that like warmer temps. Especially a 10 gallon doesn't give you much space to work with. I too have my goldfish in a 10 and am looking for a 20+ gallon replacement tank. I would probably only get 1 more goldfish unless you plan to get a bigger tank soon. My goldfish are definetly begging me for a larger tank right now.