The Radiants - Sitting In The Park Interview with Maurice McAlister and Wallace Sampson Soul Source member Bob just posted up details of his Sitting In The Park latest show.. Today on my radio show I interviewed two members of legendary Chicago soul group the Radiants, the original lead singer Maurice McAlister and member Wallace Sampson, the only singer who was a member of every lineup of the group. I usually write up a bio of the group but it was a great interview and it's worth list