http://www.rte.ie/sport/soccer/features/loilegends.html
I am shocked that Bobby Charlton had a season with Waterford United in the mid 70s. 
My personal favourite legend is Stephen Geoghegan. Got the goals that won Rovers the league in 1994. Also because of him being used by Jack Charlton by drafting him in for a friendly and never a hope of being played. 
Kevin Doyle a LOI legend. Thats a bit much
Doyle in there is a bit ridiculous. Dixie Dean and Bobby Charlton were cracking players but not sure how long they spent in Ireland.
Jackie Jameson is getting my vote, not because I ever saw him play but it’s probably the best chance of getting a Bohs player high up in the list. I can see Rovers fans voting for a fairly large spread of players.
I was going to mention JJ but I decided to leave it up to you to mention the great man.
Theres quite a feww hoops to choose from obviously but i went for Pat Byrne.
i’d say Paddy Coad will win it tho. He better win it anyway.
as long as some no mark like george ocallaghan or a newbie like kevin doyle dont win.
it would make a bit of a mockery of the whole thing.
also as a rovers fan, JJ was the best bohs player i’ve seen in the 27 years i’m going to games.
Frank Devlin for me.