1. Fender Stratocaster

This is what Jimi Hendrix used to play. Clapton got himself a strat and named it Blackie (guitar), which he played for almost 30 years before parting with it in a charity event where the proceeds (a whopping $959,500!) went for his rehabilitation clinic that he established. Hendrix and Clapton are names enough to vouch for the strat.

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 (This is what Classic Rock looks like)

2. Gibson Les Paul/SG

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Les Paul, the legend, designed this guitar. This guitar has had more widespread popularity than the Strat, IMO. Jimmy Page was a huge fan of the Les Paul and the SG. Gibson made the double neck SG on special request made by Jimmy Page which was featured in the song "Stairway to Heaven" in the concert at Madison Square garden. Jeff Beck and Pete Townshend are among other notable people who use the Gibson Les Paul.