Yu Himura from Ef - A Tale Of Memories/Melodies seems the best to me.
You could also use the male lead of most romance harems such as
Shingo Uryū: Mashiroiro Symphony
Kazuma Hoshino: Hoshizora E Kakaru Hashi
Yuuri Mito: Tayutama: Kiss On My Deity
Pretty much anything that was originally a visual novel. They all will have the kind and gentle demeanor that Mr. Rogers has
Also Craft Lawrence from Spice and Wolf could work well, he is older than all the others and looks more like Mr.Rogers.
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