Any Unknown or Unlisted Aircraft Manufacturer
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 8
Time Pressure; Situational Awareness; Distraction; Workload; Communication Breakdown
ATC Issue All Types; Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Procedure; Environment - Non Weather Related; Human Factors
I was working Local Control and had four aircraft waiting to depart  with Aircraft X on short final to an intersecting runway and Aircraft Y still about 10 mile final for the same runway  on an instrument approach for a option back to radar pattern. There was also two VFR picture taking aircraft around the Tower airspace at 2700 feet. I asked Aircraft X if he could land to hold short of the intersecting runway. He said he could; though hesitantly. I cleared him for LAHSO(Land and Hold Short). I began to depart the other aircraft of the crossing runway with turns and to also have them stop at 2000 feet for the picture takers. When Aircraft Y checked on; I cleared him for the option. My biggest mistake was putting expeditiousness over safety. I overlooked Aircraft X in two important ways.  I had an expectation bias that he would exit the runway before the intersection and  even the I scanned the runway; I missed him sitting at the intersection. The color of the plane and the concrete made it difficult to notice him. Not until Aircraft X keyed up to talk did I remember he was there but by then Aircraft Y had touched down; saw the aircraft and was stopping to avoid.This situation very poignantly reminded me (because it was a very close call and so thankful it was not more serious) that safety is our number one priority. As a facility we need to have a clear reminder that a runway is occupied as opposed to one single light that carries multiple meanings.  We should clearly define a procedure for LAHSO as well.
A tower local Controller reported they allowed a military aircraft to land with another aircraft stopped at an intersection on the runway.