The phrase "alone at the front" is correct and usable in written English.
It can be used to describe someone who is isolated or standing by themselves in a leading position or at the forefront of a situation.
Example: "During the presentation, she felt alone at the front, as all eyes were on her and she had no one to support her."
Alternatives: "isolated at the forefront" or "solitary at the front".
This left Frost alone at the front of the church.
Without realizing it Sunday, Radcliffe was in a familiar position, alone at the front of a race in New York.
At twenty-three miles, he and the Ethiopian Tsegaye Kebede were alone at the front, engaged in the sort of physical and mental duel rarely seen in long-distance running.
Set to Prokofiev's romantic yet dissonant Violin Concerto No. 1 in D, the ballet opens with the dancer alone at the front of the darkened stage, a shadowy group behind him.
Bresset caught a break when Spitz crashed over a technical section of the course called the rock garden, which also slowed Gould and left Bresset alone at the front.
Voigt and McGee went off alone at the front of that group around 25 kms from the finish and it was Credit Agricole rider Voigt who proved the stronger in the final head-to-head.
Despite the top five athletes all running personal best times, Zersenay was alone at the very front from 10 km onwards.
My training had included many slide shows about the stigmata of cigarette burns, belt marks and other suspicious injuries, but it was the first time I had been the person alone on the front line, looking at a mark on a child, knowing something was wrong.
That first night I saw them, I sat alone at a table at the front, and there were maybe five or six people there.
The flag, when carried in a procession or parade or with another flag or flags, should be on the marching right or alone in the centre at the front.
On a recent morning Nardelli sat alone in the front row of the 250-seat amphitheater at Chrysler's headquarters for a monthly quality review session.
