The best replacement for smosh is nigahiga.

The best alternatives to smosh are rated as following:
★★★★★  nigahiga
★★★★  fred
★★★  pewdiepie
★★★  rwj
★★  shane dawson
★★  erb
★  tobuscus
★  oishi

Your alternative for smosh is not listed? Suggest!
Speaking about smosh, one probably shouldn't forget about pewdiepie.

Other search terms related to smosh and their ratings are:
★★★★★ pewdiepie
★★★★ shane dawson
★★★ epic meal time
★★ tom hiddleston
★ big guns
★ ray william johnson
★ slender man
★ nigahiga
tobuscus
slender
You have in mind a companion for smosh and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of smosh in all years. Click on graph for more.
smosh
nigahiga
fred