Not so many I's in my garden.
Ile Rouge (white streaks on leaves are not RMV - this rose has variegated foliage)
Immortal Juno (HUGE! blooms)
Ina an Mona (sport of Austin's 'Leander')
Ines Sastre (aka Raspberry Cream Twirl). Absolutely stunning old-fashioned blooms in great profusion
Isabella Rossellini (now a goner)
Isabelle Renaissance (hard to capture it's deep velvety red)
Ivor's Rose. One of my favorites - gorgeous bush, extremely healthy without spraying. One bush on the bush shot, it is probably 7'-8' across. Less than favorable location, no supplemental water, no food.