As a basis for discussion, ahead of the meeting, I've compiled the proposals we received from everyone.
Literal
Discussion [possessive-の] basis [goal-に] do [purpose-ために], meeting [prior to-に先立ち], everyone [from-から] received proposals [object-を] compiled-tried.
Business Japanese with several formal elements: に先立ち ('prior to') is a formal temporal conjunction, いただいた is the humble past of もらう (elevating those who submitted), ~てみました adds self-effacing modesty, and 皆様 is the formal 皆さん. Reads like a meeting preamble.