Vertical align bottom and remove the float seems to work. I then had a margin issue, but the -2px keeps them from getting pushed down (and they still don't overlap)
.profile-header > div {
display: inline-block;
vertical-align: bottom;
float: none;
margin: -2px;
}
.profile-header {
margin-bottom:20px;
border:2px solid green;
display: table-cell;
}
.profile-pic {
height:300px;
border:2px solid red;
}
.profile-about {
border:2px solid blue;
}
.profile-about2 {
border:2px solid pink;
}
Example here: http://www.bootply.com/125740#