The only pokemon that can resist ice and electric without the help of an ability are rotom-h, rotom-F, Magneton, and Magnezone. There are several pokemon that are neutral to it, however. With thick fat, Mamoswine essentially resists ice and gets an immunity to electric. Goldeen and seaking both resist ice, and their lightningrod abilities deal with electric. Lanturn has volt absorb plus its typing to deal with both, but since you said you didn't want it or Magnezone, the rest are up there.