There are a lot of ATGMs that have top-attack capabilities, I think you might refer to the BGM-71F TOW-2B. Other models e. g. are the Swedish BILLs, the South Korean Raybolt or the German PARS 3 LR. The thing is, not many models are in widespread use. And then there is the destinction between hand-held, tripod-mounted and vehicle-borne ATGMs. Of the latter, there seem to be more, but of the first kind, there are only few, as kato mentioned.