English Dubs
Paul St. Peter is good in the English dub Digimon as well, as Leomon, Cherubimon, and a bunch of other Digimon. He also voiced Xemnas in KH2 if I remember correctly, but he sounded a lot different from when he voiced Leomon.
Steve Blum provided voices for Guilmon (whose voice I can copy almost perfectly), and Falcomon in Digimon Tamers and Savers' English dubs, with other Digimon, too.
Derek Stephen Prince voiced Ken Ichijouji, Veemon, Impmon, and numerous other humans and Digimon, in Digimon's English dub. I especially liked him as Beelzemon (Impmon's Mega form in Digimon Tamers).
Crispin Freeman voiced Koichi and Tohma in Digimon, and he also voiced for a game I play on the PC called Paraworld. He really pulled off a good British accent in that game!